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Audi A4 / S4 / RS4 repairs by problem area

Engine (45%)

Transmission and Drivetrain (6%)

Brakes and Traction Control (6%)

Suspension and Steering (11%)

Electrical and Air Conditioning (20%)

Paint, Rust, Leaks, Rattles, and Trim (7%)

Other (4%)

Chart based on 4985 repairs.

Audi A4 / S4 / RS4 engine repair cost distribution

$2500+ (8%)

$1000 - $2499 (20%)

$500 - $999 (24%)

$100 - $499 (40%)

< $100 (8%)

Chart based on 1000 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

2015 Audi A4 4dr Sedan

supercharged 333hp 3.0L V6 7-speed automated manual AWD

9000 mi Evap sensor 
107300 mi

US $2500
Thermostat, water pump 

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2015 Audi A4 4dr Sedan

supercharged 333hp 3.0L V6 6-speed manual AWD

4000 mi CEL came on. Dealer had to R&R Manifold Absolute Pressure sensor. 

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2014 Audi A4 4dr Sedan

turbocharged 220hp 2.0L I4 8-speed shiftable CVT FWD

8000 mi Emission control problem 

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2014 Audi A4 4dr Sedan

supercharged 333hp 3.0L V6 7-speed automated manual AWD

13000 mi Indicated cooling failure; coolant was low. Inspected by dealer, coolant refilled, no other repair. 

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2013 Audi A4 4dr Sedan

turbocharged 211hp 2.0L I4 8-speed shiftable automatic AWD

77700 mi

US $100
Replaced breather control valve. 
44000 mi Check engine light showed lean faults and low fuel pressure. Breather was leaking so breather valve was replaced along with fuel pressure sensor. After repair next day car flashed epc and check engine light came on. This time fuel pump was replaced. The flow of fuel was a little lower than what it should've been according to the tech. All happened only during moderate to hard acceleration.  Check engine light again due to cylinder misfire under moderate to hard acceleration. Plugs replaced. Repairs finally fixed issue and engine running fine. 

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2013 Audi A4 4dr Sedan

turbocharged 211hp 2.0L I4 8-speed shiftable CVT FWD

98000 mi

US $8700
Piston and ring Failure in the #4 Cylinder, "0" compression. All Compression leaking into the crankcase. Required total engine replacement 
98000 mi Check engine light, gas tank vapor valve stuck. Fixed. Replacement engine used one extra quart of Ultra Moly synthetic 5-40w over 10,000 miles. So far OK. In the next 10,000, used 2 extra quarts added over 10,000 miles between oil cnange. 
117000 mi

US $15000
Ring Failure in Cyl. #2. Complete engine replacement. Dealer new engine is $9500 plus dealer labor. Likely $15000 cost. in process. This is a 2013 going on its 3rd engine. Complete new factory engine installed, 3rd one, tested and road tested by dealer. I kept the damaged engine for a rebuilder to bore & Nickasel plate the cylinders install custom pistons and rings for long mileage. Through the new break in. 
130000 mi

US $616
New engine and using a quart of oil every 1,500 to 2,000 miles. Replaced crankcase pressure control valve and a burnt spark coil plug wire. Asked for a compression test at my expense. Slowed to a quart per 3k. 
19000 mi Rough idle followed by check engine light, and hard stuttering shortly after. Fuel injectors replaced but cylinder found to be cracked and leaking fuel/oil causing misfires. Engine replaced. 

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2013 Audi A4 4dr Sedan

turbocharged 211hp 2.0L I4 6-speed manual AWD

27280 mi misfire cylinder 4 due to leak on the crankcase 

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2013 Audi A4 4dr Sedan

supercharged 333hp 3.0L V6 7-speed automated manual AWD

47700 mi

US $100
Common problem that the thermostat fails early. Thermostat wont open completely and over heat unless you have heater on high bypassing thermostat. Problem just popped up out of nowhere but you car drive it until you have time. Tricky repaired 
46000 mi Oil pressure sensor was replaced 
8000 mi EPC dashboard error. Cylinder 3 misfire (lost power and could just coast home). Dealer can't recreate problem. Couldn't isolate specific error and thus fix it. Got car back without any repair completed. 
25000 mi Crankcase valve sensor failed causing EPC error; repaired under warranty. 

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2013 Audi A4 4dr Sedan

supercharged 333hp 3.0L V6 6-speed manual AWD

18000 mi Engine stalled intermittently at stop lights. No warning lights or fault codes. Dealer could not identify problem but adjusted air flow (?) and replaced battery in key. Problem has not recurred in three weeks. 
Control module on water pump reported a failure. Pump physically working fine. Electronics failure so pump was replaced. Had to ship from Germany which what took the most time over Christmas/New Years. 
43000 mi Water pump leaking; replaced under warranty 

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2012 Audi A4 4dr Wagon

turbocharged 211hp 2.0L I4 8-speed shiftable automatic AWD

32000 mi replace water pump 
48360 mi Oil consumption test. The car requires 2 quarts of oil between the scheduled oil changes 

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2012 Audi A4 4dr Wagon

supercharged 333hp 3.0L V6 7-speed automated manual AWD

27000 mi Fuel control module / pump failure. 

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2012 Audi A4 4dr Sedan

turbocharged 211hp 2.0L I4 8-speed shiftable automatic AWD

35000 mi Check engine light came on while driving, no change in way engine ran. Determined the crankcase breather valve, oil separator was the culprit. 
34000 mi One of the hoses in the engine bay had come loose and needed to be replaced. The car was in & out in 1 day and the impression i got was that the repair was very straightforward. No issues since getting the car back. 
62000 mi

US $250
Vacuum leak, oil separator 
96000 mi

US $900
Water pump failure. Replaced 
110000 mi Crank case breather valve replaced 
123000 mi

US $235
Replace leaking valve cover gaskets 
38000 mi check engine light - MIF sensor 
54000 mi

US $900
Leaking water pump 
63000 mi

US $310
CEL for System Too Lean. Replaced leaking oil separator breather valve. 
79000 mi

US $85
leaking water pump 

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2012 Audi A4 4dr Sedan

turbocharged 211hp 2.0L I4 6-speed manual AWD

39680 mi Replaced bad injector cylinder number 4 - misfire code. Cleaned the intake ports at the same time. 

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2012 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 8-speed shiftable CVT FWD

50220 mi

$4000
One of the piston misfire, may require engine overhaul; update: still in shop two months later 

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2012 Audi A4 4dr Sedan

supercharged 333hp 3.0L V6 7-speed automated manual AWD

43000 mi oil kept burning every 5000 miles, they changed out some valve 
21000 mi Check engine light 
35000 mi Thermostat failed closed. Dealer representative indicated this is due to the plastic t/stat housing distorting, causing the thermostat to bind. Dealer representative indicates design has not been changed -- new part is the same G336 Intake manifold flap sensor found faulty. Fault P2014 
20000 mi Nuisance Check Engine Light - Software upgrade was installed to ensure problem wouldn'r reoccur. 
12000 mi

US $568
Supercharger auxiliary cooler was punctured by debris causing a coolant leak & requiring replacement. Not covered by warranty. 
14000 mi Engine throwing ecm codes. ECM replaced. Replaced all 6 fuel injectors. 
31000 mi Thermostat failed. Replaced by dealer under warranty. 
28000 mi burning oil at a pretty high rate (about 1 qt every 1k mile or less. The dealer performed an oil consumption test and had the piston rings replaced on all cylinders. 
37000 mi fault for sec air scan 
10000 mi Check engine light came on. Vehicle ran fine, OBD2 diagnostic revealed a very slight fuel mixture imbalance. Dealer said they replaced some parts of the fuel rail to injectors and updated the ECU program. Car runs a bit smoother now. 
43000 mi Had to have carbon build up removed per the existing Audi tsb. Surprising it occurred this early since I drive mostly highway miles 
3000 mi EPC light would come on and car would misfire under full throttle. Dealer swapped the number 6 coil pack with number 5 and problem solved. 
37000 mi Thermostat failed at ~36,600 miles 

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2012 Audi A4 4dr Sedan

supercharged 333hp 3.0L V6 6-speed manual AWD

8000 mi Hole in auxiliary radiator. 
34000 mi Engine Rear Main Seal leaking, needed replacement, required 11 hours of labor covered by warranty 
24000 mi burning smell during hard acceleration with AC on. 
34000 mi Only issue was exhaust smell inside cabin during hard acceleration. Dealer replaced air box inside but did not resolve the problem. 
115940 mi Oil leak from valve cover gasket onto exhaust manifold 
115940 mi

C $80
Misfire on load at low revs cyl4 reproducible reliably on 2nd gear low rev opening throttle. Eventually purposefully caused CEL to light. Obdii p0304. Replaced all 6 spark plugs 
118740 mi

C $10
Erratic idle occasional miss with shudder. No codes in obdii or warning lights. Will clean throttle body by end of month 
121520 mi

C $350
Did not clean Throttle Body as per prior note - replaced all spark plugs, all spark plug wires, and battery. Runs well now. 
13700 mi

US $1100
Rock hit radiator. Radiator leaked. 
24000 mi Car overheated. Replaced thermostat. 
30000 mi audi secondary air injection system P0491 audi secondary air injection system P0492 
42700 mi The dealer diagnosed a bad clutch based on my report that revs were "hanging" (i.e. rpms were not dropping as expected) when I engaged the clutch on a first to second shift. The car is driveable and I have not repaired it yet. Audi refuses to warranty. 

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2011 Audi A4 4dr Wagon

turbocharged 211hp 2.0L I4 8-speed shiftable automatic AWD

81500 mi

US $85
Leaking air valve. Replaced 
92000 mi High oil consumption led to replacement of pistons 
40000 mi CEL came on. Replaced leaking PCV valve. 
61000 mi

US $85
Failed coilpack 
30000 mi Stage 1 fix for oil consumption (1 quart per 2000 miles). Replaced PCV and crank seals. Updated ECU. 

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2011 Audi A4 4dr Sedan

turbocharged 211hp 2.0L I4 8-speed shiftable automatic AWD

55000 mi

US $90
Oil separator pump was bad (too strong), caused air leakage through rear main engine seal. Oil separator pump replaced. 
63000 mi Car consumes 1 quart of oil in about 1700 miles. Still in the testing phase. But the manager said Audi will likely be replacing the pistons and rings. 
63000 mi If I had continued with the test they say it would have been enough to cover the piston and ring replacement, but I did trade it before completing the test. 
17000 mi Engine was burning oil. 
16000 mi Car burns oil. Dealer replaced several parts and asked us to come back after 600 miles for inspection. 
16700 mi Still burning oil, dealer installed new rings. Seems to have worked. The digital oil level sensor seems to be flaky now, but all else is ok. Once the sensor dies, dealer will replace.  
37000 mi High oil consumption test part 1. 
28500 mi Excessive oil consumption. Needed to add a quart after roughly 1300 miles. Dealer agreed to perform Phase I oil consumption test (still under warranty). Replaced crankcase valve seal and updated software. If doesn't work, Phase II is pistons and rings. 
52000 mi Vehicle was exhibiting excessive oil consumption due to factory defect in piston rings. Entire all four cylinders replaced with new rings under warrantee work. 
45000 mi Engine burning oil. Changed PVC valve. 
82000 mi

US $150
Car was badly misfiring. Fixed with a can of fuel injection cleaner. 
92000 mi Car was badly misfiring for the second time. This time they figured it was 2 ignition coils that needed to be replaced. 
94000 mi

US $4250
Pistons and rings needed to be replaced. 
125000 mi

US $200
2 ignition coils had to be replaced. Have replaced all 4 now. 
175000 mi

US $100
Breather Valve Replacement 
4000 mi Transmission shifting roughly in 1st and 2nd gear both upshifting and downshifting. Dealer performed software upgrade for the problem. It is now definitely better, but not as smooth as I would like. 
19000 mi The car randomly stuttered then the engine would turn itself off. After several days of doing this eventually would not start at all. Replaced fuel control solenoid. 
42000 mi The coil packs on each cylinder were replaced. The car was idling very rough, EPC and engine light came on while driving. 
101000 mi

US $550
Oil consumption issue, replaced PCV valve and front crankshaft seal 
103000 mi Excessive Oil Consumption due to improper clearances. Replaced the pistons and piston rings. 
21000 mi Car would occasionally have a rough time starting. Engine would cough and revs would stay below 800RPM. 
48000 mi Oil consumption test: piston rings were replaced. No charge as this is a known problem with Audis. 
56300 mi

US $350
Oil separator failed leading to low oil pressure warning. Part was replaced 

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2011 Audi A4 4dr Sedan

turbocharged 211hp 2.0L I4 8-speed shiftable CVT FWD

7000 mi Rough idle after cold start. Fixed per TSB. 

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2011 Audi A4 4dr Sedan

turbocharged 211hp 2.0L I4 6-speed manual AWD

62620 mi

C $175
Ignition coil pack was faulty. Audi dealer had part in stock and replaced. 
14000 mi Felt like engine missing (erratic car vibration at idle, stopped). Dealer pulled codes, said no misfire. Returned car, will monitor and take back when more pronounced. 
46000 mi Fuel cap failed pressure test during annual emissions inspection. Cap replaced. 
53000 mi

US $110
Cylinder 4 misfires under heavy load. Check engine light came on. Replaced coils and spark plugs, fixed problem. 
65000 mi Check Engine light came on, diagnostic indicated something related to nonsense intake position reading. Removed/cleaned throttle body, reinstalled. Cleared CEL, no additional message after 2k miles. 
14260 mi Occasional rough idle on start-up which would disappear after no more than 30 seconds. Dealer found trouble code and an existing TSB on the problem. Performed work which included an oil separator. 
29920 mi occasional pre-detonation sound (pinging) on acceleration; occasional slightly rough idle which can occur at any time (warm/cold). 
41540 mi knocking sound when accelerating e.g. 6th gear from 2,000 rpm. Happens intermittently. No codes. Used scope to look for carbon build up or leaking injector. Nothing found. Could not reproduce it again when measuring ignition timing. 
28000 mi Piston replacement due to high oil consumption. 
37200 mi Engine check light was on, and the engine was consuming about 1 liter per 1500 km, a turbo valve was replaced 
37200 mi

C $59500
Engine check light was on, turbo system was faulty, part was not in inventory, so part had to be ordered. turbo was replaced in 5 days. 
32000 mi I don't recall exactly what was replaced. Something had come loose and caused various issues. 
71700 mi

US $700
Cooling fans running high-speed only; fans continue to run after engine off. Diagnosed as fan control module and relay. Fan control module not in stock; will schedule install once part arrives. 
83000 mi car consuming 1 qt oil per 1100 miles. Proposed repair was to replace pistons and rings. Decided not to do the repair. 
25000 mi Failed water pump - slow leak. Installed: 06H121026CF water pumprnWHT006407 seal, 06H121131C union 
33000 mi Engine idled rough. Dealer replaced ignition coils under warranty 
52000 mi

US $1000
Engine code P0299, turns out to be turbo charger failure. Issue is identical to this TSB, but Audi claims my VIN isn't covered. TSB#TSB-21-13-14 Summary: AUDI: ON SOME VEHICLES THE TURBOCHARGER WASTE GATE FLAP IS LOOSE. DTC P0299 

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2011 Audi A4 4dr Sedan

supercharged 333hp 3.0L V6 7-speed automated manual AWD

45000 mi Low coolant level light. Found leaks in both radiators (regular & supercharger). Replaced radiators and installed protective grill. Repaired under warranty. 
45000 mi

US $784
Thermostat failure 
42000 mi Thermostat Failed. Leaked coolant. Thermostat Replaced under warranty. 
82000 mi

US $600
Thermostat failed and was replaced. 
51700 mi

US $85
fuel pump replaced, fuel pump control unit replaced, crankcase regulating valve replaced (TSB) 
5700 mi Coolant level low. System checked for leak, none found. Coolant added. 
33000 mi secondary air ports clogged. Cleaned ports with pressure washer 
42000 mi Engine using more oil than expected between changes. Replaced crank case breather. 
49000 mi Excessive oil consumption. Service performed per manufacturer TSB. Issue seems to be resolved 
56700 mi Thermostat replace 
4300 mi check engine light came on. it was a faulty evaporation valve. 
18000 mi I experienced a single bout of unintended acceleration. I had to put the car in neutral in order to stop what was a somewhat heavy self acceleration. It only happened once. Dealership could not reproduce and therefore did nothing. 
28000 mi Thermostat failed in the closed position 
22700 mi While driving, coolant level warning came on and engine was overheating. Pulled over, towed car to dealership. Dealership noted "Thermostat was stuck closed" and replaced thermostat. 
1000 mi My DSG S4 shortshifts in manual mode. In automatic mode it will shift at redline no problem. Apparently most new S4s have this issue. 
3000 mi Engine coolant thermostat replaced 
26000 mi Low oil level warning alerted after 2500 miles (since last oil addition). Dealer performed oil consumption test and found oil consumption within spec. Interval to add oil dropped from 5K to 3K to now 2.5K. Regular service is at 10K. 
40000 mi

US $7
Engine low on oil between oil changes. Added 1 quart. 
34000 mi

US $1200
Thermostat stuck closed, flatbeded to dealer, was replaced previously on recall ~ 7k miles, now again at 33k miles 
28000 mi

US $100
Engine thermostat 
7000 mi Thermostat got stuck. Warning light came on. Would have cost about $650 after labor and parts, but it was under warranty. Thermostat replaced. 

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2011 Audi A4 4dr Sedan

supercharged 333hp 3.0L V6 6-speed manual AWD

51000 mi

US $800
Thermostat went bad again so engine was overheating. Second time since I owned the car. 
11160 mi Carbon buildup in the engine. 
55000 mi

US $1000
Noticed elevated temperature on dash gauge and radiator fans running full speed. No warning light indicated, but taken to shop. Thermostat failed closed. 
14000 mi Gas vapor leak occurring during warm weather. Hard to replicate. Nauseating smell. 
14500 mi Gas vapor leak again. Replaced some parts that seem unrelated. I'll see if it continues. 

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2011 Audi A4 / S4

Engine not specified

2000 mi Check engine light was on. Found the second bank intake was stuck open. Was taken back after the parts came in to be repaired. Took about 5 hours and they gave me a loaner car.  

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2010 Audi A4 4dr Wagon

turbocharged 211hp 2.0L I4 6-speed shiftable automatic AWD

72000 mi

US $400
Had coolant flange leak repaired than subsequent low temp reading and thermostat replaced 
72000 mi

US $850
Had oil change, new diverter valve, and cam follower checked/replaced. Found follower damaged and had to repair HPFP as well. 
156000 mi

$600
Changing the valve seals. Only natural for an engine that's been running this flawlessly for so long. 
65000 mi Oil consumption test. Also recheck the original software "fix". They will schedule a piston and ring job next. replaced pistons and rings, finally fixed oil consumption issue. Auxiliary water pump discovered signs of leakage while replacing pistons and rings for oil consumption. Dealer charged over $400 for part and 2.5 hours...$675 for repair 
32700 mi Oil consumption had gone up dramatically in the past year. I kept a record of when I added oil and mileage - and provided that info to the Service Mgr. They changed the front crank seal and a valve of some sort. 
42000 mi Dealer did part 2 of the oil consumption test, and my car passed that test, its using oil within limits. 
36000 mi Engine running very roughly, blowing black smoke, check engine light on, eventually car stopped completely. Car towed to dealer. Fuel injector on No.2 cylinder apparently faulty and was replaced. 
38700 mi Malfunctioning purge valve. Part replaced 
45000 mi Car has suddeny started using a lot more oil than usual (additional oil being required every 1,000 miles instead of the usual 3,000-3,500. Car was inspected for leaks and oil was changed. 
77000 mi Excessive oil consumption. Persistant problem since new. Set up for Part I oil consumption test over next 1,000 miles. Car has averaged 1700 miles per quart of oil and since first started monitoring consumption at 16000 miles. 
78000 mi Car has been using excess oil since new. They agreed to install new pistons and rings Water pump was leaking. News pump installed at no cost. Car is out of warranty but Audi is footing the bill for the new pistons and rings plus the water pump. 
40500 mi Excessive oil consumption 
50220 mi Had a stage 1 oil consumption test. 
47720 mi Engine was leaking oil after the pistons were replaced under warranty. 
77700 mi Oil consumption test showed excessive consumption. Pistons & rings to be replaced. Head had gouge damage and was replaced. 
82000 mi

US $660
A valve associated with crankcase ventilation developed a crack. Diagnosed & replaced. Also tire noise identfied. 

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2010 Audi A4 4dr Wagon

supercharged 333hp 3.0L V6 6-speed manual AWD

62000 mi

US $300
Replaced coil packs again after getting misfired (even though the car was already running the new 'revised' packs - version T.) The packs were about 18 months old. 
13640 mi temperature gauge of the cooling system was not working properly - sensor G2 has been replaced 

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2010 Audi A4 4dr Sedan

turbocharged 240hp 3.0L V6 Diesel 7-speed automated manual AWD

39060 mi air intake valve 

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2010 Audi A4 4dr Sedan

turbocharged 211hp 2.0L I4 8-speed shiftable CVT FWD

15979 mi Replaced faulty fuel injector #3. Symptom: Engine suddenly ran rough, lost power, eventually flooded. Smell of gasoline fumes. Check engine light. 
32500 mi Excessive consumption of oil, about 1 quart per 1k miles on average from time of purchase. Repeatedly told that this was normal for Audi's turbo 4 cylinder engines by the dealer. Consumption test performed then finally replaced pistons. 

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2010 Audi A4 4dr Sedan

turbocharged 211hp 2.0L I4 7-speed automated manual AWD

21080 mi To high Oil consumption. Change valves and did consumption test. 
37820 mi Car was using excessive Oil. Engine was rebuilt with updated valves and rings. 
46500 mi

A $2600
Engine valve collet broke. Valve entered the engine destroying the internals. Unclear if related to recent rebuild, Audi would not elaborate. Without dealer assistance the total would have been $28500. 

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2010 Audi A4 4dr Sedan

turbocharged 211hp 2.0L I4 6-speed shiftable automatic AWD

28520 mi replaced crankshaft seal and PCV, oil consumption test, faulty injectors, carbon cleaning off intake valves. high pressure fuel pump losing pressure; update: misdiagnosis 
53620 mi Oil consumption, drinks 1Qt every 1000km 
69000 mi

US $2000
Valve burnout, rocker-roller push rod gave out and caused lack of compression. 
72700 mi

US $100
Failed pcv 
11000 mi fuel injector failed and was leaking. put car in limp mode. 
9000 mi fuel injector exploded on freeway. car almost straned in ghetto of los angeles. limp mode home. fuel injector had to be replaced and loaner car given. had to work from home as i was on vacation for holidays... 
44000 mi the catalytic converter failed. likely due to massive oil burning of this car (1 qt every 1000-2000 miles). took week to repair, horrible audi dealer had no loaner cars, gave me rental toyota yaris 
45600 mi PCM valve and crankcase seals replaced due to known issue on 2009/2010 a4s with EA888 engine. this is known as stage 1 fix, for oil burning. stage 2 is piston ring replacement. i didnt wait i sold the car before stage 2 
77000 mi

US $85
1. Crankcase breather valve leaking. 2. Oil pressure switch malfunction. 3. Rough idle. Replaced leaking Crankcase Breather. 
34000 mi TSB performed to address oil consumption issue. 
27900 mi

C $15
low oil. Added a quart after 5,000kms / 4months since last oil change. Dealer says oil consumption still within tolerance. 
29140 mi

C $10
low oil warning came up and topped up with 1 quart. 
35340 mi

C $800
Water pump failure. $300 parts. Rest labor. 
61000 mi

US $50
During routine maintenance, water pump was found to be leaking and replaced under warranty. 
63000 mi

US $645
Piston ring replacement was completed under warranty for excessive oil consumption. Added costs incurred during work to replace rear main, front cover seals and clean cam shaft oil bridge filters. 
54000 mi

US $820
Failure of 1 fuel injector. 
66000 mi

US $85
bad turbo bearings. 
35000 mi Engine burned a quart every 1000 miles. Oil consumption test resulted in new seals and software update. Audi performed taillight seal recall 
74700 mi

US $1144
Replaced Air Intake Separator Tech noticed water pump leak on prior visit. Water pump replaced. 
81500 mi

US $3100
Underboost CEL. Replaced turbo. 

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2010 Audi A4 4dr Sedan

turbocharged 211hp 2.0L I4 6-speed manual AWD

17500 mi oil leakeage, seal replaced 
47000 mi Warning light came. Replaced catalytic converter for free and replaced spark plugs 
54000 mi

US $3000
Clutch needed to be replaced. I think the lining slowly wore out as it kept slipping increasingly. 
47740 mi Fuel pressure and fuel injection replaced 
27900 mi seal had to be replaced 
43000 mi Dead cam adjuster. 

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2010 Audi A4 4dr Sedan

supercharged 333hp 3.0L V6 7-speed automated manual AWD

2480 mi Engine light came on. Dealer found fuel ratio imbalance error code. System scan performed. No problems found and no loss of power. Error code erased. 
5880 mi Engine light came on. Dealer diagnosed fuel injector problem. Replaced #5 fuel injector.  
6000 mi Water pump (plastic part defective on all early-2010 B8 S4s) leaking coolant. 
7000 mi CEL for secondary air pump. Reset CEL, could not duplicate. 
41000 mi

US $1200
Thermostat failed stuck closed causing engine overheating 
25000 mi Coolant level was low. Dealer did a leak check, no problem found. Added coolant, will monitor. 
310 mi They had to replace the key part because it wasn't cranking the ignition. 
47000 mi camshaft sensor caused check engine light to go on. Replaced under warranty 
76300 mi

US $11000
Coolant in the cylinders 
99000 mi

US $1200
car was overheating and needed to replace thermostat and water pump. 
15000 mi Replaced leaking Water Pump 
17000 mi Engine light came on. Dealer diagnosed fuel injector problem. Replaced #1 fuel injector and reset engine light.  
46000 mi Check Engine Light came on with no obvious impact on vehicle performance. Dealer diagnosed a bad secondary air pressure sensor on Bank 2, ordered part and subsequently replaced the sensor under warranty. 
74300 mi Check Engine Light came on with no obvious impact on performance. Dealer cleaned secondary engine air ports. CE light came on again when picked up. Dealer diagnosed bad relay for secondary air flow motor. Replaced under extended warranty. 
15000 mi Sudden water pump failure with loss of all coolant. Car towed to nearest dealer and repaired, all the the manufacturer's expense. 
18000 mi

US $382
A "sport differential failure" warning light came on without any other symptoms. Computer scan revealed this was due to transient low battery power. Battery tested okay. 
42000 mi

US $650
Thermostat (located under the supercharger) 
1466 mi

US $750
replaced radiator from rock blasting a hole in the radiator. Customer pay.  
5500 mi Rock perforated radiator. All coolant leaked within 15 mins. They replaced the radiator. No cost, since i've only had car for a few months. Very frustrating that audi does not protect radiator on such a car 
53700 mi Car overheat. Thermostat stuck open. Replaced thermostat. 
33000 mi Oil consumption was high. Brought it in for a 35,000 mile check one month ago - they said it was ok. Less than 1,000 miles later, it showed up as needing a quart of oil. They replaced oil separator and valves/gaskets. 
43500 mi

US $100
Check engine light came on. Was a camshaft sensor that was broken. Would have been $290 + tax to repair at dealership, but I had an extended warranty. 
22000 mi Water pump failure, managed to drive to out of town dealer for repairs before total loss of coolant 
16000 mi replace crankcase ventilation hose which cracked 
9000 mi Known water pump/high pressure seal for pre-March 2010 build dates. Either the seal or plastic pump goes resulting in loss of coolant. Water pump replaced with metal pump the same day by dealership. 
30000 mi water pump failed and had to be replaced 
40000 mi the thermostat was replaced to prevent overheating 

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2010 Audi A4 4dr Sedan

supercharged 333hp 3.0L V6 6-speed manual AWD

14000 mi Water Pump Changed because it was leaking. 
78300 mi Oil was being used to quickly by engine due to an engine oil valve 
2480 mi Low oil warning light came on. Took car to dealer who topped up oil for free. 
46500 mi Coolant thermostat failed. Previously dropped the car off when there were signs of something failing (radiator fan running at max speed) but dealer concluded "nothing wrong" as per their diagnostic tools. 
7400 mi Removed and replaced temperature and pressure sensors on rear differential; adapted new sensors. 
14000 mi Coolant leak. Traced to cracked coolant hose. Hose replaced under warranty. 
66000 mi Excessive oil consumption. The dealership replaced the oil separator, which has solved the problem. Because the car had been involved in a recall in 2011 due to a coolant pump issue, Audi of America extended the drivetrain warranty to 5 yrs/72K miles. 
69000 mi

US $790
Erratic coolant temp and AC failure. Diagnosed as thermostat failure. Replaced thermostat. 
10000 mi Water pump blew leaving car unable to be driven. WP replaced 
11000 mi

US $457
IC radiator punctured by road debris. Car flatbedded to dealer. IC radiator replaced. Tstat also replaced at that visit. 
7000 mi Complete loss of coolant due to failure of water pump seal. During the car's 5000 mile service, loss of coolant was reported to dealer, but they could not find the problem and simply topped off the cooling system. 
20000 mi Oil consumption issue. Traced to loose filter. 
8860 mi Coolant dumped, had to replace water pump. Second trip to get coolant leak entirely fixed. Dumped coolant again 2km after first repair. They said I also had a hole in the radiator for the intercooler but I couldn't find any hole in the old part. Probably covering up a mistake with first attempt. 
27000 mi Replaced pass. side downpipe, had a rattle inside at certain RPM's 
47000 mi

US $10
Intake air temp sensor on passenger side has an implausable signal, MIL on, dealership diagnosed, sensor working to specification, reached audi tech line, sensor replaced per audi tech line. 
30000 mi Occasional rough idle and odd vibration at just over 1000 rpm. Dealer said it was normal compared to other like cars. 

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2010 Audi A4 / S4 / RS4

Engine not specified

29000 mi bad valves 

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2010 Audi A4 / S4 / RS4 4-door

supercharged 6-cylinder automatic AWD

8000 mi Plastic impeller failed on water pump. Know problem to Audi. Informed by Dealer that Audi are instructing dealers to wait for owners to notice problem and fix it rather than recalling cars. Reason: shortage of water pumps / impellers 

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2009 Audi A4 4dr Wagon

turbocharged 211hp 2.0L I4 7-speed automated manual AWD

43400 mi

A $400
New PVC fitted to reduce excessive oil consumption. 

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2009 Audi A4 4dr Wagon

turbocharged 211hp 2.0L I4 6-speed shiftable automatic AWD

55500 mi

US $550
PCV valve failed resulting in excessive oil 'consumption' 
56000 mi

US $325
Engine was misfiring and thus running very rough. Problem was finally diagnosed as an ignition coil failing 
70000 mi High oil consumption. Replaced pistons and rings. 
155000 mi

US $900
Heater core hoses cracked and replaced. Coolant tank was leaking and was also replaced. Aux radiator cooling fan not working, and preventing AC from functioning properly. 
165000 mi

US $900
Replaced aux cooling fan. Head gasket leaking. Smells bad. Leak not severe, so living with it for now... 
172000 mi

US $375
Replace oil cooler seal Serpentine belt cracked. 
172700 mi

US $75
Serpentine belt 
173000 mi

US $750
Flex joint cracked and made engine extremely loud. Flex joint replaced and re-welded. Catalytic converter did *not* need to be replaced. 
45000 mi Turbo assembly had to be replaced. 
42000 mi Faulty turbo boost Diverter Valve. Repaired under warranty. 
55700 mi Loud moaning sound on cold start up. Dealer claims this is due t the air injection system, and "all 2009 A4 models with the 2.0 do this. I'm working on a second opinion on that. Also, power mirror pre-sets wouldn't work. They did fix that 
40000 mi Engine was using excessive amount of oil. Performed repair per service bulletin to correct. 
61500 mi

US $850
CEL came on because a flap on the intake manifold was sticking. Intake manifold needed to be replaced. 
68300 mi Oil consumption test confirmed that I needed to have phase 2 done to resolve problem. Replaced 4 pistons, rings and all gaskets. Was covered under warranty even though warranty expired. 
83000 mi

US $400
Oil separator had a leak causing misfires in engine. Part was replaced. 
51460 mi

C $85
Excessive oil consumption 
74400 mi

C $365
Excessive oil consumption. > 1qt per 1000 kms. Oil consumption test is being performed 
75640 mi

C $600
Excess oil consumption. Vehicle has 'failed' oil consumption test. Data has been sent to Audi for review. 
78740 mi Performed Audit TSB 2039655/1 Excessive Oil Consumption. Measured cylinder bore for scoring - within limits. Replaced pistons and piston rings 
82460 mi

C $1100
Carbon build up in intake jammed air intake flapper causing electrical actuator motor to fail. 
86180 mi

C $540
Check engine light. Mechanic confirmed thermostat failure. Replaced part. 
78300 mi

US $85
replace electronic ignition key lock mechanism after getting a 'defective ignition lock' error messagernrncar is on CPO, copay $85. 
88000 mi

US $85
Excessive oil consumption. Dealer replaced oil 'separator' and initiated consumption test. 
92000 mi

US $280
significant oil leak from rear main seal 
5500 mi  
40300 mi

US $1500
Leaking water pump 
14260 mi Material defect in intake manifold. Car idles rough and misfires at low RPM. Audi located the problem and ordered the parts.  Problem manifold replaced and repaired. ECU reflashed. Much better performance. 
60760 mi

C $350
Needed new spark plugs and oil change. 
67140 mi excessive oil consumption 
40000 mi While under the car to change the oil, I noticed a residue of dried coolant on the side of the engine oil sump. It led up the side of the engine to a very slow leak associated with the water pump. 
41300 mi After bringing in for oil change on June 24, oil light came on and brought it back on July 23. Less than 1000 miles later. Dealer did Step one repair of oil burning recall procedure. Said to bring back if issue continues. For step 2. 
43300 mi

US $650
Oil light came on again, and step 2 was performed of Audi class action suit for Oil consumption. Dealer says the engine "basically now has zero miles" New pistons, rear seal, and also a new water pump. 
25000 mi New ECU flash per TSB concerning transmission not shifting out of 2nd gear intermittently. Engine leaking small amount of coolant. Replaced hose clamp attaching coolant hose to water pump.  
33000 mi car misfiring and eventually stalled out without being able to restart. #3 Fuel injector stuck open flooding engine. R&R #3 fuel injector 
34500 mi

US $18
REPLACE CYLINDERS BECAUSE FOR EXCESSIVE OIL USE.  
38000 mi Oil consumption test & manufacturer repair. 

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2009 Audi A4 4dr Sedan

turbocharged 211hp 2.0L I4 8-speed shiftable CVT FWD

23560 mi PCV changed, ecu reflash, camshaft adjusters 
40300 mi

A $1200
stage 2 repair, piston and rings 
55000 mi

US $1700
This month the car was taken in for a recall -- also found that the engine mounts needed replacing. Cost 1700.00. 
68000 mi Excessive oil consumption. Took car to dealer. Replaced some components and upgraded ECU software. 
68700 mi Replaced pistons, rings and other components 
75000 mi

US $1460
Replaced crankcase vent valve, replaced front crankcase seal, perform software update, carbon blast intake valves. 
51000 mi

US $650
Leaking waterpump. Replaced pump and thermostat. 
8000 mi CVT was shifting funny... computer setting fixed the issue. 

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2009 Audi A4 4dr Sedan

turbocharged 211hp 2.0L I4 6-speed shiftable automatic AWD

22000 mi slowly losing coolant with no apparent cause or location 
18000 mi Found runner assembly in intake manifold was loose causing vacuum leak 
19300 mi Installation of ordered part, car now runs normally 
49000 mi turbo assembly and water pump replaced. 
48000 mi Engine was consuming excessive oil. Got a low oil error on the dashboard. The car was still under warranty, so they put some new parts and adjusted the cam shaft position. Dealer told that they are aware of this problem with Audis with turbo 
92000 mi

US $2500
Computer system issue 
28000 mi Excessive oil consumption (1 pint every 2000 miles). Dealer said within normal range, but Audi suggested a computer reflash and replacement of some parts. Excessive oil consumption described in problem 1. Parts installed. 
106000 mi Check engine light with code P2181 which is a well known issue with a coolant temperature sensor 
47000 mi Needed a new turbo. Out of warranty time wise but within warranty mileage wise. AOA covered the repairs after a little nudge from me. 
68000 mi

US $1000
Needed a new water pump 
41000 mi Faulty ECU, caused battery to completely discharge. Dealership replacing under warranty. 
60000 mi

US $900
replaced both cooling fans due to failure 
90300 mi Oil consumption/leakage. In the shop for diagnosis. 
93000 mi New pistons / rings / gaskets - oil consumption issue. It seems mostly fixed, but still consuming a little oil (very little compared to what it was consuming). 
69000 mi

US $2830
Replace water pump due to coolant leak Replace faulty motor mount due to hydraulic fluid leak 
26300 mi Occasionally, the transmission won't upshift from the 2nd to 3rd gear. Dealer refreshs the TCM. 
38000 mi Coolant slow leak, dealer replaced water pump assembly. 
47000 mi Tech found vacuum pump leaking and replaced vacuum pump 
48000 mi fuel pump and camshaft follower were replaced because of engine noise during acceleration  
59000 mi Oil leak from timing case cover seal 
1800 mi Bad water pump. Waiting on part from Germany. Total time in the shop will be over 2 weeks. 
50700 mi Oil Consumption, replace PCV & gasket, pulley bolt and ECM flash. 
51300 mi Oil consumption part two. Replace pistons, rings, and all gaskets. 
69000 mi

US $1000
MISFIRE CYLINDER #1, ALSO BURNING A QUART OF OIL PER 1200 MILES. NEVER GOT TO THE MIS FIRING PROBLEM, SOLD CAR..... 
66000 mi Temp gauge was drifting down after the car came up to operating temp. Diagnosed as failed thermostat. Replaced thermostat / water pump assembly under CPO. Coolant leaked after picking car up, replaced with second water pump assembly. 
33000 mi Replace crankcase pressure regulator valve 
60000 mi

US $62
Engine control unit 
15500 mi vacuum hose replacement (hose was cracked and was throwing codes). 
44640 mi turbo - wastegate repair. No charge - recall, extended warranty item. Scheduled appt, then got CEL before taking it in. Engine performance much better. 
7000 mi ignition switch replaced 
55000 mi

US $2300
Turbo charger failed 
15000 mi Blinking CEL, no power under boost, white exhaust and fuel smell, and rough idle. Was able to drive to dealer. Dealer found bad fuel injector. Part was back ordered, once dealer received part, was fixed that day. 
26000 mi My intake manifold was leaking and they replaced the gasket I believe. Running great now! 
63300 mi Oil consumption test. "Passed test". No repairs offered, told to add oil as needed. 
64000 mi

US $107
water pump replaced. 
64000 mi Conducted Part 1 of 2 part 2.0 TFSI engine oil consumption test for excess oil consumption. 
5000 mi When warm, engine causes car to shake slightly when in gear and releasing the brake pedal, as to accelerate from a stop at a stoplight. 
13000 mi Key fob was stuck in ignition, could not be removed, car could not be shut off. Key extracted, switch should be OK, but cosmetic plastic "gateway" for fob was broken during extraction, and has not been replaced. 
48000 mi Intake manifold replaced - valve popped out replaced leaking water pump 
50000 mi engine running rich - high pressure fuel pump replaced 
76000 mi oil consumption TSB stage 1 and 2 - replace breather valve - replace pistons/piston rings camshaft damaged - replaced timing chain stretched and damaged - replaced 
44000 mi Engine was burning oil too quickly. The dealer had to make some adjustments to fix the problem, but no details were provided. 
46000 mi

US $500
Ignition Key was not starting the engine sometimes. A yellow key symbol with a red cross (X) on it came on the instrument panel with an error message. 
18000 mi

US $500
Car using over 1 quart of oil every 500 mi. 
74000 mi

US $85
Known oil consumption issue with this 2.0t engine. Took in for Stage 1 and Stage 2 repairs. Oil use was 0.5l/1000mi. Received new pistons and rings. So after 500mi, no oil consumption issues. 
84000 mi

US $400
Intake manifold leaking. Redesigned intake manifold installed. Audi paid for one-half of bill as car is only 4 months out of CPO warranty. 
55180 mi

C $1
Oil consumption 
80600 mi

C $250
Fuel injectors replaced (x2). Carbon cleaning. 
84320 mi

C $250
Piston rings and Pistons replaced for oil consumption 
30000 mi Oil Consumption in excess of manufacturers recommended add levels. 
31000 mi The car failed the oil consumption test parameters and has been slated for new piston rings. 
32500 mi The auto failed an oil consumption test and subsequently had the piston rings replaced due to faulty tolerances. 
51000 mi The turbo waste gate was not operating correctly 
69300 mi

US $1000
A long block had to be installed due to the camshaft being out of alignment and ruining the engine. 
38000 mi The car felt like it was stalling while driving and prior to stopping. Software was updated to repair problem. 
47000 mi Low oil light would come on frequently even after filling up. Software was installed to correct. 
62020 mi

C $850
Engine light came on--Needed to replace water pump and change oil separator. Car still drinking too much oil. 
70060 mi Excess oil burn. They made the service adjustment in early April but no change. Taking it in for another fix. 
53700 mi

US $675
Intake manifold had a faulty flap and needed replacing. 
55000 mi

US $222
Oil separator valve leaking 
67000 mi Engine was built with one piston of the wrong size, causing excessive oil consumption. Audi did consumption tests and determined that the engine needed to be rebuilt with the correct part installed. 

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2009 Audi A4 4dr Sedan

turbocharged 211hp 2.0L I4 6-speed manual AWD

91000 mi

US $550
Motor Mounts 
58500 mi

US $85
Part I of Oil consumption test including replacing breather valve and seals. Replaced water pump. Replaced gas tank cover actuator. 
70000 mi

US $85
Part 2 of oil consumption test: failed Replacement of pistons and piston rings. Car started bucking at 3-5 rpm. Took to shop, but no check-engine lights came on. No fault codes found in computer. No repair made. They suspect bad fuel as the culprit. 
75000 mi

US $540
Car acceleration not smooth, surging with wide open throttle. Low pressure smoke test showed a leak in the engine cover/timing belt cover. 1 day to diagnose. 1 day to install new parts. 
89000 mi

US $6000
Complete replacement of the head 
91000 mi Check engine light on for the 6th time in 3 years. 
55700 mi

US $330
Engine misfiring during boost 
57000 mi

US $125
Failed PCV - replaced with updated part 06H103495AC. Confirmed after replacement that the gasket inside had torn. Common problem - under 1 hour DIY. 
60000 mi

US $1600
Clutch slipping. Could have driven for thousands of miles if I baby it. Replaced with ClutchMasters FX350 and retained flywheel which was in good shape. Cannot fault Audi for failure - my car makes far more power than stock. 
31000 mi Check engine light came on and indicated intake manifold problem. After testing determined flaps inside intake manifold were loose. Replaced intake manifold. 
76000 mi

US $900
Check engine light. Indicated misfire in 3 cylinder. Determined to be carbon buildup on valves. Cleaned valves. Significant improvement in mpg noted and engine running very well 
85000 mi

US $531
vent valve sticking and drawing oil from rear seal - replaced and updated computer 
105000 mi

US $450
Completed Stage 1 oil test and failed. Installed new rings and pistons. Serpintine belt failed 
97000 mi

US $2500
Crack in water pump. 
43000 mi stage 1 oil consumption repair performed. Returned after 800 miles for consumption calculation. no further repair needed. two trips to the dealer. 
61000 mi check engine light went on. scan indicated intake manifold fault. intake manifold replaced. covered under the 7/70 california emissions warranty. 
19220 mi Damaged / missing intake manifold. Noticed due to engine stalling when turning on a side street (dangerous!!) and whole car shaking on idle. Parts ordered once diagnosed by dealer then replaced next day.  
68200 mi

C $400
exhaust clamp broke and had to be replaced. Discovered the problem, drove 40km to garage and exhaust almost fell.. had to wait for part to come in. 
51460 mi

A $180
Replaced air intake sensor. Engine warning light came on and stayed that way. 2 trips to attempt repair required. 1st attempt was just reset of codes and test drive. 

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2009 Audi A4 4dr Sedan

265-horsepower 3.2L V6 6-speed shiftable automatic AWD

34720 mi

C $1800
Replaced leaking fuel injectors and spark plugs. Replaced leaking coolant line. 
11000 mi Reverse Error Jerky shifting in low gears (automatic) Vibration in wheel at high speeds 
97340 mi

C $4000
Fuel injectors plugged. 7 hours of Audi labour + parts = CDN$3300! 

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2009 Audi A4 2dr Convertible

255-horsepower 3.1L V6 6-speed shiftable automatic AWD

30000 mi Check engine light came on. Dealer updated software and reset engine light. Light came on again. 
36000 mi Check engine light came on. Cleaned fuel injectors and reset indicator. 

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2009 Audi A4 / S4

turbocharged 4-cylinder CVT 2WD

14880 mi Collapsed engine mountings. New engine mountings fitted.  Drive chain noisy, also replaced under warranty. 
16740 mi Camshaft chain and additionals related to camshaft chain. Car sat for three weeks waiting for parts from Germany. 
27280 mi New turbo ordered to be fitted, whistling. 
31000 mi Car using excessive oil (500ml/1000kms). Previous TSB hasnt resolved issue. Seem a new TSB is out so car has to be rebooked for work to be done. 

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2008 Audi S4 4dr Wagon

340-horsepower 4.2L V8 6-speed shiftable automatic AWD

35960 mi

C $100
leak in valve cover gasket 

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2008 Audi S4 4dr Wagon

340-horsepower 4.2L V8 6-speed manual AWD

55000 mi

US $1100
Needed replacement of rear timing chain housing 

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2008 Audi S4 4dr Sedan

340-horsepower 4.2L V8 6-speed shiftable automatic AWD

42000 mi Replace ignition coil on cylinder 1. Covered under warranty 
48000 mi

US $500
Replace serpentine belt 
79000 mi

US $2401
oil stand gasket. oil filter housing gasket, intake manifold gasket. R&R Cooling system; expansion tank; radiator hose expansion tank hose. R&R Valve cover gasket, left and right 

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2008 Audi S4 2dr Convertible

340-horsepower 4.2L V8 6-speed shiftable automatic AWD

87000 mi

US $199
Took in for power steering leak. Dealer couldn't find, but "found" multiple oil leaks. After bringing car home from dealer, check engine light came on. Fixed at no charge. Don't know if caused by previous work. Overall, I had to take the car back and forth to the dealership 4 times in 10 days. 
92000 mi

US $1028
Had to replace two O2 sensors 

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2008 Audi RS4 4dr Sedan

420-horsepower 4.2L V8 6-speed manual AWD

70000 mi

US $5000
Serpentine belt tensioner rubbed an hole in the oil cooler I think because of faulty installation when the car was at another dealer for earlier work. Audi of America and the other dealership disagree... Tensioner, belt, and cooler replaced. 
77500 mi

US $1150
Check engine light came on. Diagnosed as leaky vacuum line and repaired. 75k service also performed, as well as replacement of underbelly tray. 
85000 mi

US $2500
throttle body failed. replaced with remanufactured unit. oem part, but not audi-branded. 
31000 mi car shut down while being driven. would not start and had to be towed to dealer. found faulty fuel pump regulator. 
33300 mi

US $85
Slow to start and smelled fuel at start up. Replaced fuel pump and fuel filter. 
38000 mi

US $1500
Needed a carbon clean. Normal maintenance for this engine. 
56000 mi

US $100
Engine Replaced Due to Cylinder Wall Scoring 

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2008 Audi A4 4dr Wagon

turbocharged 200hp 2.0L I4 6-speed shiftable automatic AWD

61360 mi

C $50
oil consumption 
64440 mi

C $30
down one litre of oil - AGAIN 
71300 mi

C $10
low oil 
62000 mi

US $40
Gas cap open error and check engine light. It was the N80 valve that needed replacing. I saw that it was an easy fix, bought the parts from the dealer for $40, and fixed it myself in about 30 minutes. 
72000 mi

US $340
Thermostat stopped working and engine would not get up to temperature. This triggered the check engine light to go on. The fix includes a new thermostat and and coolant flush with new coolant added. 
82000 mi

US $531
Oil filter housing leaking where it connected to engine block. Housing removed and gasket replaced. 
121000 mi

US $620
Thermostat failed. Replaced thermostat and Coolant Temp Sensor 
126000 mi

US $175
Replaced Coil Packs and Spark Plugs 
167000 mi secondary air system- incorrect flow detected. smoke test did not show any leaks. combi valves suspected, possible the head ports are blocked with carbon buildup, meaning an attempt to clean or replace, ie take car to carmax :( 
168000 mi

US $200
cam sensor codes. both sensors replaced. still have codes. wiring checked extensively (8+ hrs labor, billed for 2 hrs) and the was too much resistance in some of the wires. solution at this point is a new/used wiring harness 
50000 mi Car had CEL for cylinder misfire. Seemed like bad coil pack but they had trouble getting the problem to occur again. 
75000 mi new valve cover gasket 
44000 mi Hissing noise under acceleration, possible small loss in power. 
55000 mi

US $85
Broken engine mount 
59000 mi Dealer never figured out cause of hissing noise under acceleration. 
28000 mi Leaking oil on valve cover. PCV Valve replaced with new revision. 
77000 mi

US $50
Replaced faulty coolant thermostat. 

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2008 Audi A4 4dr Wagon

turbocharged 200hp 2.0L I4 6-speed manual AWD

80000 mi Would have needed a carbon cleaning in the near future. CEL on cold start, number of miles. It ran fine, but not for too much longer! 
55000 mi

US $950
Intake Camshaft was damaged due to HPFP and Cam Follower failure. Replaced cam and HPFP with new OEM. Did a full timing belt service "while I was in there" but it wasn't strictly necessary. 
73500 mi Check engine computer light came on, dealer found fuel pressure sensor and exhaust gas sensor bad, fixed under extended waranty 
76000 mi

US $1680
High pressure fuel pump drive cam came apart and destroyed fuel pump and camshaft. 
76000 mi Check engine warning light on, seems to be misfiring, shop can't determine for sure problem, may need software update that they can't do, may need new #4 injector, or could be dirty valves. Will run valve cleaner through then have s/w check 
77000 mi

US $500
#4 injector was replaced for same problem noted in Apr 12. This corrected the problem. 
24800 mi Clutch switch failure meant engine revs increased when changing gear-manual trans; fault showed as error code from VCDS in ECU module; switch replaced under factory warranty; Dealer also performed scheduled 40000km service during this visit 
37500 mi Faulty control valve caused "check engine" light to come on. Could feel engine running rough and RPM fluctuate at idle above normal steady 750 RPM to a range of 1,250 - 1,750 RPM. 

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2008 Audi A4 4dr Wagon

255-horsepower 3.1L V6 6-speed shiftable automatic AWD

60540 mi

C $1500
Engine pump needed replacement 
61380 mi

C $1800
cam shaft and chain tensioner replaced 

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2008 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 7-speed shiftable CVT FWD

29000 mi car stalled 10 times backing out of parking spot. nearly was towed, started eventually after calling tow truck. Audi wasnt certain of cause, sensors replaced, fingers crossed.  
27000 mi Diaphragm in crank case valve was sticking. 
48000 mi Car sluggish, loss of power, and RPMs dropping dramatically at stop lights. Fuel pump replaced.  
78000 mi

US $700
Cooling system; replace aux fan and thermostat 
45000 mi Oil leak The oil light came on again and car was 1 qt low since 1 mo. ago. No sign of another leak. Filled and monitoring consumption will be next step. 
46000 mi Rusnak Audi performed the second half of an oil consumption test and found that the car was consuming more oil than it should and they repaired seals in the engine which fixed the problem. They gave us a loaner car and repairs were free 
76300 mi

US $1400
Cooling system, the water pump needed to be replaced along with the timing belt and the thermostat 
86000 mi

US $50
Had to get new gas cap cuz of breach in vacuum system light came on to tighten cap but original cap kept failing so replaced 
71000 mi

US $1200
CEL came on at 71000 miles. Turbo recirculation valve failed and was replaced.  Also had to replace the front 2 engine mounts. 
87000 mi

US $200
engine valve cover gasket was replaced. 
93000 mi

US $140
Failing coil pack causing timing issues. Replaced all 4 coil packs and spark plugs myself. 
66000 mi

US $85
Motor Mount Replaced driver/front 
18000 mi Higher than normal oil consumption at 1 quart per 1,000 miles. Gas mileage also below expected. Replaced 'flapper' valve. No, oil consumption and gasoline mpg up 20 - 25% 
59700 mi

US $150
Valve cover needed to be replaced 
100000 mi

US $650
Thermostat replacement 
107000 mi

US $485
Check engine light--fuel metering system running too lean ar idle--replaced crankcase vent valve assembly 

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2008 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 6-speed shiftable automatic AWD

46000 mi

US $700
Thermostat stuck open and not allowing engine to come up to temp at highway speeds. City driving was generally ok, but slow to warm up. 
47000 mi

US $850
In-tank fuel pump failed. Car would start fine when cold but when running short city errands with several on/off cycles it would eventually fail to start. 
34000 mi Replaced small valve from intake system; Audi service bulletin recently released 
38000 mi The valve cover gasket was leaking, so dealer took it apart and replaced with new gasket. 
12000 mi CEL came on; diagnosed as fuel low pressure sensor; part replaced; light has stayed out, car runs normally 
41300 mi

US $300
Tensioner squealing. They changed tensioner, rollers and timing belt. 
45700 mi

US $100
Diverter valve bad 
7400 mi Check engine light (CEL). Faulty low fuel pressure sensor. Replaced under warranty. Free rental. 
28000 mi

US $200
PCV valve failure... Replaced with aftermarket pcv valve catch can. 
29000 mi Crankcase gasket had a leak and was replaced 
22000 mi Crank case breather hose needed to be replaced. Caused rough idle at start. This is a common problem with this model. 
27000 mi I purchased the car used and squealing serpentine belt tensioner and belt included on the "we owe" list from the used car dealer. Rough idle. Audi dealer checked and replaced PCV valve.  Noticed valve cover gasket leaking. Valve cover gasket replaced while I waited. 
46000 mi Loud engine noise when car cold and large oil consumption 

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2008 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 6-speed manual FWD

41000 mi Malfunctioning PCV valve 
114000 mi

US $250
Coil Pack replacements 

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2008 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 6-speed manual AWD

24000 mi burning a quart of oil every 2k miles. Bad PCV assembly. PCV & valve cover gasket replaced 
24000 mi Continued to lose oil. Replaced valve cover gasket & assembly. Problem hasn't returned. 
111000 mi

US $70
Misfire came from faulty spark plug 
110000 mi

US $150
Engine sputter during heavy acceleration. 
115000 mi

US $300
Broken motor mount and snub mount replaced 
40000 mi PCV valve failed and blew oil all over the engine cover. Was replaced under extended warranty. 
46000 mi

US $85
Timing belt was making a screeching noise. It took 4 back to back trips to the dealer to get them to finally replace this under CPO Warranty. 
53000 mi Car was burning oil at a rate of approx. 1qt/1000mi. Dealer was supposedly doing consumption test, but WAY overfilled the oil (2+ qts overfilled). Didn't end up fixing the problem. Will have to go to another dealer to resolve consumption. 
57000 mi

US $80
Motor was drinking 1qt/1000 of oil. Dealer did oil consumption test and piston rings were going to be replaced. During the repair, scoring on cylinder wall #4 was discovered so the motor was replaced. 
13000 mi There was a rattling noise coming up between 2000 rpm and 2600 rpm, which was initially diagnosed as a defective diverter valve. After it has been replaced, the noise is still there. The car runs a little bit hesitantly. 
32000 mi Noticed less than 1 quart oil missing - oil level was half way between min and max. No CEL ever showed up - which is a good thing. Dealer noticed some oil stains on engine cover. Dealer diagnosed and replaced the PCV valve, everything under warranty. 
47000 mi Replaced faulty O2 sensor. 
36000 mi Oil spewing from bottom of engine. Valve plugged causing pressure on gasket. Fixed, repaired, replaced, cleaned. 
36000 mi broken breather valve in engine. too much oxygen going into engine. would not idle very well 
54560 mi CEL was on, changed gas cap and reset CEL 
62000 mi PCV Valve problems. Free replacement at dealer as a result of warranty extension on part. 
77500 mi

C $150
The vehicles camshaft follower failed and led to the destruction of the fuel pump and the intake camshaft. 
40000 mi Idle very irregular. Replaced PCV valve. 
63000 mi

US $75
Engine is consuming oil. Dealer took reading of oil level and instructed us to drive car for 1000 miles and return to dealer. Based on consumption, dealer will repair. 
64300 mi

US $75
Repair related to December visit for excess oil consumption. They are replacing piston rings. Repair appears to have been unsuccessful as car is still consuming oil. Car returned to shop today (April 23rd)for further diagnosis. 
67000 mi Engine continues to burn oil even after piston ring replacement. 
68000 mi Follow up to earlier reporting oil consumption issues. Dealer finally replaced long block with new long block. 
80000 mi

US $900
Return oil hose from turbocharger was leaking badly 
65500 mi

US $85
Valve cover gasket replaced. 
68000 mi

US $250
Vapor lock from -15F temps. Warmed up in mechanics garage solved problem and now drive it on the highway. 
25000 mi Crankshaft ventilation valve clogged. Caused valve cover gasket to fail. Oil sprayed on inside of engine bay. Some cars similar to mine had a recall on this part, mine was not one of them. 
25000 mi Fuel Pressure Sensor was replaced. Replacement did not help. 
41000 mi Cam Shaft Follower was worn out. This was replaced and problem was fixed 
40000 mi Check engine light turned on after 4 hours of driving, 2 different times... car was driving normal. Audi said nothing was wrong and reset  
59000 mi Car was idling roughly and not powering consistently. They replaced spark plugs and coils. 
61000 mi Cleaning valve heads finally seemed to work. 
78000 mi

US $2300
$2200 for 4 tires, oil change, alignmt, 75k check, and fuel filter (check engine light). Still needs $2200 timing belt replacement. Light came back on immediately - fuel sensor/pump TSB? Now to dealership. 
4960 mi fuel latch. not well repaired 

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2008 Audi A4 4dr Sedan

turbocharged 160hp 1.8L I4 8-speed shiftable CVT FWD

32860 mi Fuel pump. Car drivable but there was a huge loss in torque. 
37820 mi Engine mount replaced. Symptom: car shaking all the time on any gear, and made changing gear (automatic) feel a little lose. 

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2008 Audi A4 4dr Sedan

255-horsepower 3.1L V6 6-speed shiftable automatic AWD

27000 mi Water pump failure, recalled part. Towed and repaired within 3 hrs in the middle of a snowstorm. 
28000 mi Coolant was low, warning light alert. Audi checked the system under pressure to insure no leaks, all was OK, added coolant and good to go. 
13000 mi Water pump replaced. 
55000 mi Vacuum line was broken. Replaced it. 
85400 mi

C $2300
engine severely misfiring, multiple fault codes, engine ran in limp mode. primary cause a failed, likely stretched, timing chain, one of the ones at the top of the engine, for one of the cylinder heads valve train. fixed most of misfire. secondary cause of misfire was severe carbon buildup in cylinder heads. cleaning the carbon build up fixed the last of the misfire codes, and the recommendation was to use the BG 44K every 6 months to keep it under control. 
97340 mi

C $650
Replacement of leaking hydraulic motor mount 
97960 mi

C $875
Failure of oil system leading to 1/2 engine shutdown. Was not repaired. Replaced vehicle. 
15000 mi Check engine light on and engine started rough when cold. Engine light came on. Engine started rough with a cold start. 
18000 mi Rough start with engine misfiring. 
26000 mi Cold start is rough. One of the cylinders is misfiring. 
38700 mi Some cylinders continue to misfire, particularly on cold start. 
44000 mi Engine continues to randomly misfire on cold start. Since I was going to turn in the car--it's a lease--they just reset the engine warning light so that it would go off. 
44000 mi Engine still randomly misfiring when turned in. 
27000 mi

US $300
Carbon buildup was causing the engine to misfire in a couple of cylinders. A chemical clean out was needed. 
12901 mi Check Engline Light on. Error reset and fuel additive added. 

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2008 Audi A4 4dr Sedan

255-horsepower 3.1L V6 6-speed manual AWD

13020 mi Water pump broke 
86800 mi Valve gasket 
89900 mi

C $300
Vacuum tube 
18000 mi Saturday morning I noticed a small leak. Later the car lost all coolant. Tuesday it was towed to the dealer and fixed on the same day. I had a loaner. Everything: tow/loaner/repairs were covered under warranty. 
31000 mi Check engine light came on. Light went off after two days. Dealer checked computer and found a sensor malfunction 

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2008 Audi A4 2dr Convertible

turbocharged 200hp 2.0L I4 7-speed shiftable CVT FWD

48000 mi

US $120
Oil leak 
55760 mi

$850
The coolant in the radiator was running low and it was identified that the water pump had a leak on it and thus the coolant was leaking out. The water pump was replaced. 

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2008 Audi A4 2dr Convertible

255-horsepower 3.1L V6 6-speed shiftable automatic AWD

35000 mi engine misfire 
82000 mi

US $90
Check engine. Misfire. Just swapped coil packs. Has not recurred. 

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2008 Audi A4 / S4

Engine not specified

132060 mi

€400
Throttle body was damaged. Needed to change, and sensor to throttle body was broken also. 

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2008 Audi A4 / S4 / RS4

Engine not specified

19840 mi Carbon buildup - FSI engine (3.2l) 

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2007 Audi S4 4dr Wagon

340-horsepower 4.2L V8 6-speed shiftable automatic AWD

27000 mi losing antifreeze. gasket replaced 

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2007 Audi S4 4dr Wagon

340-horsepower 4.2L V8 6-speed manual AWD

29000 mi

US $50
coolant leaking - found a faulty hose 
32700 mi Aux radiator leaking 
45300 mi

US $1000
Replace belt 

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2007 Audi S4 4dr Sedan

340-horsepower 4.2L V8 6-speed shiftable automatic AWD

66700 mi Squeaking noise during idle and acceleration. Replaced serpentine belt, idler, and tensioner. 
57040 mi Leaking Valve Covers 
64880 mi

C $700
Ignition coil faulty 
67580 mi

C $2000
Coolant Leak, water pump housing replaced 
77500 mi

C $4500
Intake Manifold Pan Valley Gasket Leak 
95000 mi

US $900
P0171 check engine code. Right bank too lean. Vacuum hose replacement 

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2007 Audi S4 4dr Sedan

340-horsepower 4.2L V8 6-speed manual AWD

62000 mi

US $600
Intake Mani gasket and 02 sensor replacement 
69000 mi

US $400
alternator belt and tensioner replacement. belt broke. 
54000 mi key/ignition cylinder refused to turn rendering car unable to drive. 
65700 mi Mass air flow sensor broke damaging throttle body. MAF and throttle body replaced. 
67700 mi

US $458
Car completely lost electrical. Nothing worked. Was told serpentine belt was too worn and would not charge battery. 
72000 mi

US $2769
Oil leak. Valve cover gasket, oil cooler o-ring. 
57300 mi (2) catalytic converters failed, so car would not pass emissions. They will be replaced under warranty. 
68000 mi

US $800
Replaced alternator drive belt, idler pulley, belt tensioner, front crank pulley & snub mount. Snub mount and belt were worn. 
74000 mi

US $400
One of the original coil packs had failed. And the wiper blades needed to be replaced. 
16000 mi When starting the car in the morning after sitting all night the engine surges for about 10 – 15 seconds. Check Engine Light came on. Code P2097 - Post Catalyst Fuel Trim Too Rich Bank 1. Dealer replaced O2 Sensor. 
23000 mi Oil level low light came one. I was told that the low level light comes on with the engine is less than 1 quart low and that it is not uncommon for this car to consume as much as 1 quart in 1,000 miles. 
35000 mi Engines surges when cold. RPM varies between 800 & 1200. 
59000 mi

US $600
Replaced Serpentine belt. It was starting to crack. 
66000 mi

US $85
Fuel pump failure. 

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2007 Audi S4 2dr Convertible

340-horsepower 4.2L V8 6-speed shiftable automatic AWD

57700 mi Serpentine belt was failing. 
61500 mi Ignition coil failure 

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2007 Audi RS4 4dr Wagon

420-horsepower 4.2L V8 6-speed manual AWD

3000 mi Intermittent hesitation when setting off in first gear. Design flaw, no repair. 
4500 mi Carbon build up in engine due to incompatibility between the engine and recommended oil. Car sent to an independent specialist with a rolling road. Car was not producing anywhere near specified BHP. Found that a problem with many RS4s. 

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2007 Audi RS4 4dr Sedan

420-horsepower 4.2L V8 6-speed manual AWD

59000 mi

US $200
ECM upgraded because the engine threw a code for Carbon Build up. I "believe" this will have the engine run a little hotter and have the threshold for the code set higher. 
51300 mi

US $1200
Carbon buildup in intake manifold and valves. Must be manually cleaned. Known issue audI won't cover. Engineering flaw with direct injection system. 
114000 mi

US $2100
Intake valve flaps and position sensors were reporting errors. The flap arms were replaced and the oil separator was replace. Intake valves were cleaned of carbon deposits. 
55000 mi

US $189
Check Engine light for "Too Lean" fault. Single O2 sensor replaced and issue resolved. 
28000 mi Oil level sensor 
89280 mi

C $100
Rear O2 sensors failed. Check engine light on. 
95480 mi

C $255
Check engine light: Outside air temperature sensor replacement. Replace O2 sensor. Replaced failed O2 sensor. 
102920 mi

C $2977
Remove and replace bank 1 sensor 2 oxygen sensor. Vibration/Buzz sporadically & rattle over bumps. Exhaust system hanger broken causing exhaust to rest on cross beam. Replaced hanger and space out cross beam. 
107220 mi

C $465
Air leak in oil/water separator 
109740 mi

C $960
Carbon cleaning of exhaust valves on block. 

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2007 Audi RS4 2dr Convertible

420-horsepower 4.2L V8 6-speed manual AWD

74000 mi

US $100
Engine not getting to operating temp due to thermostat being stuck open. Replaced thermostat. Engine gets up to operating temp. 
101300 mi

US $25
Replaced coil pack 
37200 mi

C $150
Slow leak in lower rad hose assembly 
43400 mi

C $773
Engine light came on. Analysis determined 3 out of the 8 coils were faulty. Changed all 8 and replaced spark plugs which were original 

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2007 Audi A4 4dr Wagon

turbocharged 200hp 2.0L I4 6-speed shiftable automatic AWD

59520 mi

C $320
Fuel pressure sensor failed, defaulting to reading high fuel pressure so the engine management shut down the fuel pump. Car lost power and had to be towed, fixed the same day by dealer. 
52680 mi

C $100
had noticed blue smoke on decel after heavy throttle application. dealer found PCV valve plugged, replaced valve and valve cover, cleaned out intake / intercoolers. 
89280 mi

C $1740
diverter valve and valve cover PCV system failure. diagnose and replace both. Also replace timing belt, pulleys, water pump at Audi's cost. 
38000 mi

US $1300
Cambox oil leak. Gasket replaced Thermostat housing leaking. Housing and thermostat replaced 
42000 mi

US $450
PCV failed. Audi replaced pCV and fuel regulator under emission warrantee. I had to pay for cambox oil leak. Previous mechanic failed to diagnose and dismissed my telling him the underlying issue (low miles,shirt journeys, oil on filler). 
35000 mi Faulty gas cap, was replaced under warranty. Fuel pressure regulator recall. Was made aware by service adviser when I brought the car in for routing maintenance. 
60000 mi

US $75
Failed diverter valve. Part replaced 
64000 mi

US $60
Check engine light revealed large evap leak. Diagnosed failed N80 and breather valves. 
10000 mi High pitched "whistle" at high rpms under WOT conditions. Diagnosed as PCV valve failure. 
41000 mi replaced ignition coils 
52000 mi replaced coil pack on one cylinder (which was already replaced 1 yr earlier as part of the recall);  replaced valve cover gasket 
59300 mi Intake manifold runner control motor fault 
70000 mi

US $1299
Exhaust system failed / rusted out after 9 years on salted Northeastern streets. Replaced with Europa Parts stainless performance exhaust system. A bit noisy, but noticeable performance improvement. 
29000 mi Emissions control valve failed 

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2007 Audi A4 4dr Wagon

turbocharged 200hp 2.0L I4 6-speed manual AWD

57500 mi

US $4000
Cam follower failed, had to replace intake camshaft and all related components. Also did timing belt. 
58000 mi

US $5000
cracked head on guide rail frame for camshafts. Also had a broken baffle inside the valve cover. 
70000 mi

US $600
leaking engine mount on passenger side. Ordered new mounts for $200 
71500 mi

US $200
Replaced engine mount. 
9540 mi Had brake noise (right front): "glaze" on pads reported. Performed TSB 2015505/2 (replace PCV valve) and 2015505/3 (remove & reinstall pressure regulating valve) to address small oil leak at fill cap and oil consumption (warning light - had to add ~1 qt 
47934 mi

US $177
Replaced valve cover gasket. 
50251 mi

US $369
Replaced valve cover breather valve and pipe. 
77872 mi

US $2408
Diagnosed low oil pressure problem to be failed oil pump. Oil pump replaced. 
83048 mi

US $507
Diagnosic labor and replacement of 4 ignition coils (1 fails, 2 cracked, one proactive) Routine oil change 
40114 mi Water leak in plastic ECU housing repaired. 
42886 mi Camshaft, cam follower and high pressure fuel pump replaced after cam follower failed. 
53355 mi

C $100
replace clutch pedal switch for cruise control 
55180 mi

C $100
Check engine light on: Replaced intake flap motor and diverter valve 
78120 mi Clamp connecting two sections of exhaust pipe was cracked. Replaced clamp. 
78420 mi

C $150
Camshaft position sensor was leaking oil onto engine. Replaced sensor. 
85000 mi

US $1352
Traction control light and EPC light coming on intermittently, car stalling for a period of time. Replaced throttle body and wiring. 
90000 mi

US $120
Second trip for warning lights, stalling. 
95000 mi

US $815
At the dealer three times in last six months. Each time the dealer had it for at least a week. Traction control light and EPC light coming on intermittently, car stalling for a period of time. Total of $2300, not fixed. 
29000 mi Oil pressure regulator failure, causing full oil pressure. Oil coming out of fill cap. 
47000 mi Replaced engine mounts replaced valve cover gasket 
50000 mi The car was burning oil. Oil consumption test was performed. Dealer determined that piston rings needed to be replaced. After piston rings were replaced I noticed small puddles of oil on garage floor. Took the car back to the dealer and they replaced a valve on the turbo as well as a hose that attached to the turbo. 
51000 mi

US $210
Car continued to burn oil. This time, the dealer replaced the gasket cover. So far I haven't seen any additional oil being burned. 
64700 mi

US $85
I returned from a trip and there was no throttle response even though the car would start. The ECU appears to have crashed. The dealer re-flashed the ECU and the car runs fine now. 
79700 mi

US $500
Vacuum pump went bad causing an oil leak. The pump was replaced. 
84000 mi

US $1600
Replaced motor mounts. Also replaced rear brakes. 
5000 mi Car had start problems in the morning. Fuel line pressure monitor had to be replaced.  
80500 mi

US $900
A bracket that connected two sections of the exhaust had corroded, it was affecting turbo boost pressure. It was removed, replaced and all else is back to normal. Fuel pump injector failed. Replaced. 

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2007 Audi A4 4dr Wagon

255-horsepower 3.1L V6 6-speed shiftable automatic AWD

108000 mi

US $180
Engine computer management software updated. 
110000 mi

US $343
Air intake cleaned. 

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2007 Audi A4 4dr Wagon

255-horsepower 3.1L V6 6-speed manual AWD

41000 mi Replaced Clutch sensor 
64000 mi

US $90
Timing belt case oil leak 
89700 mi

US $400
Cam shaft seals replaced, leaking oil. 
92300 mi

US $400
Intake air control vacuum sliders stuck with carbon built-up. Intake removed and cleaned to restore slider movement and clear code. 
105000 mi

US $300
Crankcase gasket oil leak 

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2007 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 7-speed shiftable CVT FWD

71000 mi

US $181
Crankcase valve replaced. Second time, AUDI/VW engineers designed a poor valve. replaced with latest model..HOPE IT LASTS longer than the previous version!!! 
87000 mi

US $104
Dipstick replaced. The plastic broke below the pull ring due to heat and poor manufacturing quality control. Sensor then detecting low engine pressure, CEL went on. Cost $104 to replace. 
104000 mi

US $2000
Timing belt and engine mounts 
123000 mi

US $275
evaporator emissions 
36000 mi Check engine light came on and originally thought it was loose gas cap. Found out from dealer there was an issue with the gas tank and it had to be replaced. Car was under warranty so I was not charged for the repair. 
99000 mi

US $650
Faulty fuel pump. 
85000 mi

US $530
Motor mounts crumbling. 

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2007 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 6-speed shiftable automatic AWD

40000 mi

US $90
PCV valve 
53000 mi

US $400
leaking coolant manifold 
15000 mi Misfire at highway speeds, especially at high ambient temperatures and with cruise control on. 
72500 mi

US $420
Head Gasket Replaced, Crank Case Ventilation Valve and Gasket Replaced 
44020 mi

C $694
Thick white smoke from exhaust and loss of power when accelerating. Diagnosis found oil in the Intercoolers. Drained oil from intercoolers, replaced hose, gasket and sparkplug 
46500 mi

C $157
Thick white smoke coming out from Exhaust when accelerating. Loss of power felt. Thick white smoke from exhaust. Check engine/Mil. light came on. 
50220 mi

C $341
Smoke reappeared on acceleration despite replacing Turbo. Dealer suggested replacing Valve cover. 
62620 mi

C $1494
Complete timing belt job Camshaft seal leaking Valve cover gasket leaking 
94300 mi Extended warranty for PCV and flap motor replacement. 
98000 mi

US $300
Hydraulic motor mount failed, replaced both, along with snub mount. Replaced cam follower after checking and finding excess wear. 
58900 mi

A $450
Crank case pressure relief valve failed and was replaced. 
98540 mi

A $350
PCV had failed and was replaced 
42000 mi crankcase breather hose replaced 
72540 mi Coolant leaked, could not find source of leak, likely result of extreme cold weather. Filled coolant, levels seem okay now. 
73980 mi Timing belt scheduled maintenance. Water pump replaced and seems to have solved coolant leak. 
88000 mi

US $200
Current problem is something with the fuel system. Car will barely crawl. Two problems within two months, not good. Love the car when it works properly, which has been about two weeks. Dealer narrowed problem down to hpfp or regulator. 
89000 mi

US $100
Used car dealer installed high pressure fuel pump with $100 deductible. Update: they installed a used pump, failed again a month later. Limping around, trying to get Audi to honor warranty. 
90000 mi

US $1200
Car running poorly, limp mode, low fuel pressure, check engine light, EPC light. Replaced LPFP and HPFP, didn't resolve issue. Dealers just throw parts at a problem. 
91300 mi

US $30
Car still going into limp mode, EPC light still coming on. Replaced two 612 or 614 relays myself based on forum suggestions, 5 minutes. Still ran awful until a shop cleared many codes. So far 150 miles issue-free. Probably $30 relays the whole time. 
92700 mi

US $115
It is still not fixed. 
94000 mi For at least 8 months I have been having fuel pressure issues. We have replaced everything under the hood fuel related even the ECM to no avail. Car is going back to the shop tomorrow. This car is a fluke not the rule. Usually a very nice car. 
26450 mi

US $571
Check Engine light lit with loss of power. Had to replace Intake Manifold Runner Control valve and reset CEL. $571.00 total cost. 
33000 mi Complained of slow shifting to 1st gear at stop. The dealer changed (updated) some software. 
51840 mi

US $2000
The oil consumption, as on many A4s, had been high. First test, performed in '09, car passed. Second test, January, 2013, car failed. Audi approved new piston rings. Work sheet indicates crank was checked and passed specs. 
59000 mi

US $20
After changing the plugs, the car ran well for 1 day. Then it started running on 3 cylinders. Apparently one coil had always been faulty. After replacement of all coils, the car runs better than when bought with 6,600 mi. on it. 
41000 mi Check engine light, shop TSB 2016868/4 states to replace intake flap motor, intake flap motor replaced. 

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2007 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 6-speed manual FWD

48000 mi

US $80
There were a few things. It went in for a recall originally. Noticed sqeaking noise from the engine. It was the timing belt. Dealership changed it. Other work done includes brake fluid flush. 
101000 mi Positive crankcase valve (PCV) was not creating the proper vacuum seal causing the car idle really rough 
118000 mi Check engine light indicated fuel regulator pressure problem. Turned out to be low pressure fuel pump controller 
5000 mi Check engine light came on. Low fuel pressure sensor replaced under warranty. 
42000 mi Replaced crankcase vent valve under manufacturer extended warranty 
53000 mi

US $125
Check engine light had been illuminated, but was no longer on. Dealer reviewed stored codes, but found no issues. Was charged $125 diagnostic fee. 
66000 mi

US $240
EPC and CEL lights illuminated at start-up. Upon restart the EPC light would go away. Very sporadic at first but eventually started occurring multiple times each day. From forums I learned others had fixed this by replacing the J757 fuel pressure relay. 
39000 mi Dealer had to replace a faulty ignition coil. Audi paid for the tow and the repair was done under warranty. No out of pocket expense.  

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2007 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 6-speed manual AWD

42000 mi Ignition lock cylinder jammed. Dealer replaced cylinder.  
44000 mi I had to have the fuel pump piston, cam follower and intake camshaft replaced due to wear. This was a TSB issue. 
138700 mi

US $200
fuel pressure regulator fault. replaced fpr and all is good again 
122700 mi

US $6008
Engine blew related to the turbo using leaking too much oil. 
45000 mi

US $190
Some ventilation crank's diaphram was dead, so the engine could not get enough air. 
61000 mi

US $200
Spark plugs misfiring, needed new ones. 
71920 mi Replaced cam cover gasket, small leak 
85000 mi Turbo bypass valve noisy. 
89538 mi Oil Consumption Test determined car is consuming 0.81 quarts of oil every 1000 miles. Parts ordered. 
92281 mi Replaced Piston Rings. 
93332 mi

US $85
My oil level was down over 1/2 a quart at 1K with new rings. And it was still bogging and blowing a plume of smoke. Valve cover crack discovered causing oil to be sucked into turbo and burned through exhaust. 5K miles - not a drop used! :) 
119000 mi

US $350
Coolant leak at flange behind engine 
131300 mi Replaced thermostat housing 
47000 mi PCV valve failed. 
47000 mi Belt tensioner was whistling when cold. 
31000 mi Cracked valve/camshaft cover 
33000 mi Car felt a slight bit sluggish. PCV valve was clogged/damaged. Dealer replaced. 
142000 mi

US $539
throttle body locked up wouldn't open, replaced throttle body 
13000 mi Check Engine light - Audi replaced an intake flap under warranty 
120400 mi

US $400
Engine mounts replaced 
144400 mi

US $400
airflow mass sensor and vacuum (ECC?) valve 
199300 mi

US $1500
Turbo underboost. Must be replaced. Debugged for all possibilities of Intake sensor or pressure valve. 
224000 mi

US $500
Turbocharger leak Vacuum system in fuel 
44000 mi fuel pressure sensor, other? engine light on (for months), covered by audi 
78000 mi

US $200
Check engine light on exhaust system fault 
79000 mi

US $600
Turbo cutoff valve replaced. Will have to return to dealer for further troubleshooting. 
88000 mi Check engine light and drivability impacted. TSB for cam shaft failure / replacement. Repair would have been over $2500 covered by AoA. Bulletin SB090111. 

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2007 Audi A4 4dr Sedan

255-horsepower 3.1L V6 6-speed shiftable automatic AWD

23000 mi Fuel Pressure sensor failed. 
63000 mi

US $323
Removed & replaced faulty fuel pressure sender 
50000 mi replaced 2 engine mounts that were leaking fluids 2 engine fault light that related to vacuum hose issues; these repairs would have been $1,600 without the warranty 
51000 mi engine light back on when sold 
28000 mi Car was running rough upon initial start up in cold weather. Re-flash causes engine to initially run richer. Problem no longer experienced. 
35000 mi

US $50
Oil leaking onto garage floor. Identified as bad cam seal. Seal replaced. 
38700 mi CEL reading claimed multiple cylinder misfires. Could be carbon build up problem or fouled spark plugs. Told to add octane booster once per month for next two months. CEL reset. 
40000 mi Car was hesitating/missing under throttle. I was told that the plugs needed to be replaced (only 16K on them). Since they replaced plugs under scheduled maintenance, no charge. I speculate could be faulty coil packs & plan 2 ask them about. 
92000 mi

US $112
CEL with P2006 & P2007 codes. Forums advised was vacuum leak & to check the vacuum tubes running across the engine to driver side. Unable to find broken tube. Shop replaced vacuum tube running across back of engine. 

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2007 Audi A4 4dr Sedan

255-horsepower 3.1L V6 6-speed manual AWD

94700 mi

US $400
serpentine system was replaced -- belt was nearly shredded and tensioners were gone. 
44000 mi

US $155
epc light comes on after engine is warm, dealer scan shows cold misfire code. i am given 2 bottles of G17 gas additive. engine starts easier, but epc light still comes on after engine warm. 
46000 mi

US $500
valve covers replaced 
47500 mi

US $2300
carbon build up on intake system 

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2007 Audi A4 4-door

turbocharged 4-cylinder manual AWD

80000 mi

US $70
diverter valve allowing boost to escape 
93000 mi

US $15
Dealer recall/extended warranty PCV Valve intake motor and thrust sensor replaced 15 dollars for loaner 

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2007 Audi A4 2dr Convertible

turbocharged 200hp 2.0L I4 7-speed shiftable CVT FWD

30000 mi

£1000
Unable to start. Initially told failed camshaft sensor, subsequently melted ignition coil. Billed for both.  
31000 mi

£1000
Further ignition coils failed 
22000 mi Replaced coilpack under warranty 
32000 mi Valve cover and oil cap gaskets were leaking, so they were replaced Burning oil under boost, replaced PCV valve, valve cover gasket, oil fill cap gasket 
35000 mi Intake manifold flap motor replaced due to CEL codes 
62000 mi

US $90
Driver side hydraulic motor mount had leaked, replaced with aftermarket solid mount 
84700 mi

US $200
Two coil packs failed, I had all four replaced 
33000 mi Excessive oil consumption of approx. 1 quart every 1000 to 1500 miles. Audi dealer says this is within spec. Noticing blue smoke from tailpipes and excessive carbon build-up. Dealer gave me spare quart for trunk. Horrible service. 
46000 mi High Pressure Fuel Pump Failed. Known issue covered under Audi's extended warranty for that part. 
34500 mi Replaced cracked intercooler Replace rear main seal-warranty 
47000 mi

US $446
Thermostat stuck open, making engine run too cool. Thermostat replaced and problem solved. on most cars, this would be a minor repair, but there's 2.5 hours labor to get to the thermostat on an Audi. 

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2007 Audi A4 2dr Convertible

turbocharged 200hp 2.0L I4 6-speed shiftable automatic AWD

31000 mi replace valve cover gasket under warranty 
59000 mi

US $400
replace valve on turbo 
51000 mi Stuck valve of some kind that caused the car to run roughly. Engine light came on as well. 
61000 mi

US $500
Car was bucking at highway speeds. 
25000 mi

US $400
Vacuum leak PCV replaced 
69000 mi

US $200
Temperature sensor 
72000 mi

US $350
New thermostat 
33000 mi PCV replacment to updated version 
35000 mi

US $200
Failed DC replaced with OEM piston type and installed PCV fix (Eurojet). Latter is basically an additional check valve that can handle higher boost peaks. 
43000 mi PCV replaced again with latest revission 
46000 mi Check engine light was on, sensor and tube for the turbo was replaced. 
26000 mi Check engine light. Repair to Emissions module 

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2007 Audi A4 / S4

Engine not specified

27000 mi breather valve went bad  

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2007 Audi A4 / S4 4-door

turbocharged 4-cylinder diesel CVT 2WD

61000 mi continuous leakage of oil into the cooling system 

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2006.5 Audi S4 4dr Sedan

340-horsepower 4.2L V8 6-speed manual AWD

68200 mi Engine is beginning to burn oil. 1 litre / quart every 1,500 kms 
72540 mi Serpentine belt frayed. Changed because would fail in next few months. 

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2006.5 Audi A4 4dr Wagon

turbocharged 200hp 2.0L I4 6-speed manual AWD

97500 mi

US $2000
Fuel pump and turbo bypass valve faulty. All but $250 covered by Geico plan. Motor mounts on both sides. All but $250 covered by Geico plan. 
100000 mi

US $1500
Car stopped accelerating on the highway. Towed to a nearest dealer for $120. Spark plugs replaced and injectors cleaned for $525. Prior to this, front brake pads and rotors replaced, second time within 1 year. 
115300 mi

US $400
Replaced the part which attaches the oil filter to the engine block. Also had maintenance done (over $300 for a check up) and 3 recalls. Check engine light was on when scheduled the servivce, but it went off by itself. The final charge was over $700. 
118000 mi

US $20
My mechanic switched coils and reset the Check Engine light. So far it hasn't turned on. 
121000 mi

US $190
Well, it's the same Check Engine light issue. 2 trips to the dealer and it hasn't been fixed. Getting ready to call the dealer today for the 3rd appointment. My wallet is getting too light! Also broken glove box door hinge and armrest latch. 
123000 mi

US $90
3rd attempt to cure the Check Engine light. Mechanic tested compression. All was fine. The light stays. 
139000 mi

US $330
Misfires in multiple cylinders. All coils replaced by the dealer. 
151000 mi

US $2130
Oil leaks 
154300 mi

US $700
Additional oil leaks. Gaskets replaced. Vacuum pump replaced. 
165000 mi

US $30
I replaced the N80 evap purge valve. 

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2006.5 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 6-speed shiftable automatic AWD

20000 mi Oil from CCV or EGR due to pressure sensor failure in the EGR system-or so they say. 

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2006 Audi S4 4dr Wagon

340-horsepower 4.2L V8 6-speed shiftable automatic AWD

23560 mi BURNING A LOT OF OIL, DEALER WANTS TO CHANGE OIL AND WEIGH IT AND THEN TAKE OIL OUT AFTER 1000KMS AND REWEIGH TO DETERMINE HOW MUCH OIL IS BEING BURNED. 
25420 mi Part 2 of an oil consumption test to determine how much oil is being consumed. 
77000 mi

US $2000
dying fuel pump 

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2006 Audi S4 4dr Wagon

340-horsepower 4.2L V8 6-speed manual AWD

80000 mi

US $700
Replaced cracked coolant overflow reservoir 

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2006 Audi S4 4dr Sedan

340-horsepower 4.2L V8 6-speed manual AWD

58500 mi

US $1700
Serpentine belt was cracked and showing wear (replaced). 
77000 mi Ignition coils failed, replace under factory campaign they were paid by Audi $138.  
84300 mi

US $600
Broken serpentine belt. 
35000 mi

US $288
Exhaust pipe brackets failed. 
96000 mi

US $1800
Relined clutch Valve cover gasket replacement 
111000 mi

US $1050
Fuel pump failed. Something was making strange noises for a month or so. Determined it was the fuel pump after it failed. Car is quiet now. 
121300 mi

US $320
Changed PCV due to high oil usage (no leaks or exhaust smell??) Tires, and wheel alighnment. Alignment only slightly out since car was manufactured. 
126000 mi

US $1700
Coolant hose leaking Fuel pump squealing 
135000 mi

US $100
Display showed coolant level low. Level OK but thermostat was stuck partially open. Replaced 
50500 mi

US $384
valve gaskets beginning to mildly seep 
132000 mi

US $4200
Cam adjusters failed 

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2006 Audi S4 2dr Convertible

340-horsepower 4.2L V8 6-speed shiftable automatic AWD

49000 mi Fuel pump / Fuel filter 
59000 mi

US $394
Defective Serpentine Belt 
64000 mi

US $1400
Valve cover gasket leaking x 2 Serpentine belt pulley got stuck, shredded belt partially, but could be freed / lubricated. 
73000 mi Failure of engine mount material Right side auxiliary radiator leaking / failed Lower Radiator hose leaking 
76000 mi

US $100
Oil filter flange was leaking 
93000 mi

US $165
Serpentine belt tensioner failure 

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2006 Audi S4 2dr Convertible

340-horsepower 4.2L V8 6-speed manual AWD

23000 mi Ignition coil replaced under notice 
31000 mi

US $600
Engine mount replacement 
57000 mi

US $1600
Clutch replacement and brake replacement 
90000 mi Engine oil light would come on in between service visits. Extended warranty doesn't cover diagnostic costs, with dealer decided step 2 of test unnecessary. 

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2006 Audi A4 4dr Wagon

turbocharged 200hp 2.0L I4 6-speed shiftable automatic AWD

103000 mi

US $65
Replaced spark plugs and cylinder 1 ignition coil 
128000 mi

US $230
Engine light, cooling system. 
58000 mi

US $450
Both engine mounts damaged. One is collapsed, the other is leaking. Certification hassle with my shady dealer. 
60000 mi

US $85
Broken engine mounts replaced by another, more conscientious dealer. 
50020 mi

A $947
Rocker cam cover gasket leak and air leak causing missing repaired. New coil packs replaced for free under service measure 28E9 and 23D6 campaign. 
78300 mi

A $3000
Fuel pump cam follower failed damaging the cam shaft 
32240 mi During the winter there was a strange noise coming from the motor when idle. Was told by the repair that is nothing dangerous and can be fixed in the next 60.000km repair. Had however some problems with the warranty since it was expired one (1!!!) day ... 
66340 mi

€750
PCV valve replaced due to CEL + unstable idle. Problem fixed. 
64000 mi

US $85
Sluggish acceleration, fixed with software reflash 
69000 mi

US $85
Evaporative System valve replaced 
77000 mi

US $85
Fuel pump replaced for second time! 

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2006 Audi A4 4dr Wagon

turbocharged 200hp 2.0L I4 6-speed manual AWD

77500 mi

US $800
Losing fuel pressure causing the check engine light to come on. 
46000 mi

US $216
Car sputters constantly near 1K RPM. Pressure Regulator Valve, Gasket, and Breather tube (vent hose) replaced. 1hr labor, $109 in parts. 
53000 mi

US $400
Cam follower on fuel pump was worn, replaced by indi shop. Cam shaft also shown wear, not yet replaced, waiting for Audi response. 
170000 mi

US $50
Replaced the serpentine belt tensioner because the bearing was going out and making lots of noise. Also replaced the serpentine belt. Did work on my own. 
212000 mi

US $500
Water Pump bearing went out. Car overheated. Then towed home. WP had 110K on it, so it was time to replace WP and timing belt all at once. 
18000 mi Check engine light came on, flashing and vehicle running rough. Restarted vehicle, running ok, check engine light on solid. Called dealer and brought it right in. Found loose connection to one of the ignition coils. Problem has not returned. 
33000 mi Check engine light came on, vehicle ran fine. Made an appointment for next day. Problem found to be electric motor that runs the flapper for variable intake runner. Dealer had part in stock, was replaced on the spot. 
61000 mi

US $80
High Pressure Fuel Pump Cam follower replaced. Original one was in bad shape. 
71000 mi

US $80
Loss of power at high load. Replaced fuel pressure sensor on high pressure fuel pump. There was a TSB for this part. This lead me to the problem. 
79000 mi Issues related to high pressure fuel system where fixed. High pressure fuel pump, intake camshaft and fuel pressure sensor were replace. Also replaced intake actuator and PCV valve. 
97300 mi

US $350
Replaced timing belt, water pump (still working), thermostat (not working, stuck open), timing belt tensioner, acc belt. 
40920 mi

C $213
Camshaft carrier leaking oil. Install new gasket and sealants. ?consequence of previous warranty repair by dealer. Repaired under extended warranty Replace PCV valve and gasket Slow and irregular idle when cold first noticed last winter not fixed by replacing coils (as per recall)No CEL 
66000 mi

US $860
motor controlling valves failed 
68000 mi

US $300
Turbo blow off valve replaced 
73000 mi

US $2200
Clutch was replaced. 
156240 mi

C $4000
Exhaust cam and position sensor 
53000 mi

US $75
Clutch Pedal Position switch failed, diagnosed and replaced myself 
98000 mi

US $98
Boost leak, vacuum line cracked, replaced. 
53000 mi I had the cam lobe wear issue dealt with by Audi under warranty. Would have been a $1000 fix I believe. It was in for 3 days in May 2009 for this fix, and I can't say for sure that it has completely been resolved. May need an aftermarket fuel pump. 
64000 mi

US $3115
Low Oil Pressure in cold temperatures (<10F), ignored warning indicator. Towed. Long block replaced. I think it was caused by ice crystals forming on the oil pickup screen. Audi has a TSB, 170825 (issued 11/21/2008). They revised the oil pump intake pipe. 
127000 mi

US $1650
Power steering pully loose, took out fan belt. Power steering pump needed to be replaced as well as fan belt 

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2006 Audi A4 4dr Wagon

255-horsepower 3.1L V6 6-speed shiftable automatic AWD

64000 mi

US $500
fault code (Check engine light) 
83300 mi

US $400
valve cover gasket replaced ignition coil failed, required replacement of coil. A recent recall was issued for this part but I don't live near a dealer so I had it replaced out of pocket. 
118000 mi

US $900
vacuum pump valve cover gaskets 

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2006 Audi A4 4dr Wagon

255-horsepower 3.1L V6 6-speed manual AWD

97340 mi

C $400
Dismantled engine to clean carbon and oil deposits on intake valves. 

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2006 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 7-speed shiftable CVT FWD

74000 mi

US $100
CEL as result of P2099 Code "underboost condition". Replaced Diverter valve with updated "D" variant that uses a piston instead of a flimsy rubber diaphragm. 
82700 mi

US $25
Check engine light. Bad Engine Coolant Temperature sensor resulting in abnormal operating readings in temp gauge in cluster. 
86000 mi

US $1600
Replace thermostat as result of code #08577 thrown. Discovered Waterpump developed a coolant leak. Prompted to do a timing belt job early to save on the labor costs involved with job. 
86000 mi

US $50
No MIL. Check Cam follower as preventative maintenance. Black finish completely worn off. Replaced with INA cam follower @ 86k miles. No damage to cam lobe. Inspect HPFP, Approaching expiration of extended 10 year warranty (2016) 
46000 mi Replace coil packs. 
53200 mi

US $85
Busted coolant hose. 
44000 mi Cylinder 3 & 4 coil packs bad; turbo recirculation valve bad 
53000 mi

US $85
PCV unit bad or leaking 
54300 mi Defective coil pack (#1) 
73500 mi Faulty fuel pump & sticking N80 purge valve 
79000 mi

US $85
Transmission control unit failure. 
96000 mi

US $30
Coilpack went bad 
102000 mi

US $40
Bad coilpack 
114000 mi

US $1700
Mild overheating. Replaced timing belt & tensioners, thermostat, coolant flange, coolant temp sensor and flushed cooling system. 
128000 mi Coil pack went bad 
52000 mi

US $50
Turbo vacuum switch and a sensor were replaced. 
53000 mi

US $50
Two blown Liquid filled engine mounts were replaced after I noticed a leak. 
65000 mi

US $50
Cam shaft was replaced due to an emissions error. Oil change also performed. Related to my earlier CEL but was not diagnosed. The CEL came back on and thus time they replaced the low pressure fuel pump. 
67000 mi

US $340
Coil pack went and Pep Boys grossly overcharged me for one coil and labour -$340. I replaced all 4 the next day off $160.  
78000 mi

US $300
Vacuum leak that affected idling. 
84000 mi

US $940
Motor mounts and snub mount replaced. 
87000 mi

US $280
Coolant flange was deteriorating and needed to be replaced. Coolant hose and temp sensor was also replaced. New coolant added. 
71000 mi

US $980
Fuel pump needed replacement. Fuel pressure was low. 
43042 mi

US $203
Replaced Breather Valve Replaced Breather Valve. Check Engine Light, Shaking of car. 
60500 mi

US $318
Tear in the Turbocharger Recirculation Valve. Check engine light. 
69000 mi

US $130
Ignition coil failure / replacement . Towed 
52700 mi Timing belt snapped due to a seized bearing; also damaged cylinders and AC 
66960 mi

C $80
N80 valve 
83700 mi

C $1800
CEL was on; replaced several parts 
102900 mi

C $3400
Leaks and knocking. Replaced engine. 
65372 mi Cooling Fan repair to fix incorrect service that was previously performed. 
69000 mi Had to replace the O2 sensor. 
69300 mi Engine repair. 
71500 mi

US $1068
Needed to replace all engine mounts (left, right, and stop mounts). Oil pressure sensor needed to be replaced. Spark plug and Direct Ignition Coil needed to be replaced. 
72000 mi Replaced two more coil packs (Direct Ignition coil), all belts, all fluids, and other servicing as needed for 80k mile service. 
22000 mi Faulty crankcase ventilation valve. 
58000 mi

US $1200
Replaced both motor mounts 
65000 mi

US $1585
Replace water pump, thermostat, timing belt, tensioner. The coolant system thermostat was faulty and triggered the MIL light. The low coolant light came on and the water pump was found to be leaking. 

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2006 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 6-speed shiftable automatic AWD

57000 mi

US $1211
Engine mount replaced, transmission fluid change / filter kit. 
30500 mi Intake manifold flapper motor failed. 
54500 mi

US $750
Replaced worn engine mounts 
57000 mi CEL on for coolant system. Needed to replace thermostat and replace coolant. 
61000 mi

US $54
Failure of diverter valve before turbo. Replaced with newer version from Audi. 
141700 mi

US $1373
Cam follower failed, taking other parts with it. Replaced the camshaft and cam lobe, seal rings, adjuster, follower, gaskets, and housing. $4,000 total, but split three ways with Audi and the dealer. Coils, breather valve, HPFP (damaged by cam follower failure). 
171500 mi

US $6900
Car was making slight noise. Upon inspection it was found that a bolt had been sheared off in the engine and a new engine would be needed. 
210700 mi

US $1063
Thermostat replaced.  
265000 mi

US $1500
Pressure regulator replaced 
117800 mi

$700
Replaced the HPFP and cam follower. Discovered worn camshaft. I replaced the intake camshaft and head gasket. 
118400 mi

$300
Then I replaced the thrust sensor and druck sensor for the P310B/ 012555 issue, but still P310B fault. No CEL or fuel cuts happened. Ordered Rear Fuel Pump, hoping this would cure the P310B fault code. 
119000 mi

$300
Replaced rear fuel pump, light out. 
120900 mi

$600
Car was running rich, mechanic recommended to replace both the Lambda sensors (front and rear) as the car age is already 6 years old. 
134540 mi

$180
Did my 10k service and same time replace my Fuel Flap Actuator and also the N80 (EVAP Purge Valve). 
136400 mi

$200
Had problem with Boost not passing 4psi, my regular boost was 17psi. This only happens when the car is warmed up. After 2 days of troubleshooting and testing as no fault codes, found out that the N75 wastegate actuator valve is faulty. 
140700 mi

$900
Replaced both Coolant Fan and Air Cond Fan and also the Control module for this. Problem was due to sudden lost of Fan power to both units. 
150200 mi

$1000
Changed my radiator as it was leaking. Replace both left and right engine mountings. Replace both left and right transmission mountings. 
99000 mi

US $200
Diverter valve diaphram torn, replaced valve 
105700 mi

US $1200
I got my maintenance done at Pure Motorsport which included my timing belt, oil change, valve cover gasket, and cam follower. It was all preventive maintenance except for my valve cover which was leaking. 
112300 mi

US $1500
I had to replace the Low Pressure Fuel Pump with Relays, High Pressure Fuel Pump, and Fuel Filter because they all went out. 
88660 mi Engine vibrates excessively at idle rpm. Audi claimed it was normal. 
78000 mi

US $90
Coil pack failure at cylinder 1, replaced all 4 coil packs. 
95300 mi 2.0T engine Cam follower 
68200 mi

C $170
needed to replace the mass airflow sensor, other than that the engine is running strong. 
71300 mi

C $340
Have to get the mass airflow sensor replaced again, plugs had to be changed also... 
148000 mi Expansion tank has a crack just above the bottom coolant line return for radiator. Crack is approximately 2 inches in length and required replacement part. Part cost is $32 shipped. 
106000 mi

US $130
Oil pressure light comes on. Engine has oil and pressure tests show no actual problem. Sensor replaced but warning light persists. 
98000 mi

US $5600
The engine froze up and it had to be replaced. The new engine has a P2293 code for fuel pressure that we are also trying to work out. This car is bleeding me dry. 
42000 mi Turbo valve issue, and low fuel sensor problems. repaired via warranty 
46000 mi Another turbo valve issue repaired via warranty. 
58000 mi

US $450
Turbo recirculation valve PCV Valve 
89000 mi

US $1000
Engine mounts replaced, both side. Right side failed. 
55000 mi DV replaced. The DV's diaphragm was ripped, loss of power and the CEL was on. 
60000 mi

US $50
CEL came up. Ran diagnostics and pulled code P310B for low fuel pressure sensor, G410 (thrust sensor). 
64500 mi

US $200
CEL with code P0642 indicating Intake Flap Motor V157 bad. Bought IFM at dealer and replaced myself, cleared codes, so far so good. 
78000 mi

US $800
P310B code for thrust sensor originally. Dealer ended up replacing low pressure fuel pump, fuel filter and gaskets. 
66000 mi

US $125
check engine light came on, engine code was check and it shown some valve was open somewhere. it could go from tail pipe through to the gas tank to the engine...technician use a wrench at one of the hose in the engine and able to determine 
53320 mi

C $2900
engine air intake issue resolved 
65100 mi Engine gasket replaced 
89900 mi

C $700
Check engine light. Replaced engine sensor. Airbag sensor also bad, will have to return. 
93000 mi

C $900
Emissions sensor out 
109300 mi

C $800
There was a leak of coolant - this was sealed. 
110980 mi

C $1000
Another coolant leak appeared over a week after the first was repaired - needed to be found and repaired 
119840 mi

C $2500
Oil leak in cylinder - repair required. 
87000 mi

US $1700
Cam and lifter for fuel pump had to be replaced due to wear. Fuel pump sensor was also replaced. This is a known problem with Audi 2.0 FSI engines fro 2006 
90000 mi

US $1600
Replaced timing belt, water pump, rollers, etc. 
116000 mi

US $1200
Fuel injector o ring blew. Valve cover gasket blew turbo blowback diverted valve blew 
122000 mi

US $480
replaced 1 motor mount 
123000 mi

US $400
CEL went on; had to replace intake valve 
28000 mi Car would not accelerate past 4000 RPM. Technical bulletin on fuel pump and cams/cam follows. Fuel pump and cam parts replaced. 
17000 mi Car brought in for scheduled oil change, tech discovered a code and replaced the faulty intake flap motor 
39640 mi recall for ignition coil O2 sensor replaced 
42160 mi

C $110
check engine light went on problem with clogged air intake and ignition coil 
45460 mi yellow check engine light on problem with intake manifold repaired on second attempt 
58900 mi

C $150
failed thermostat replaced 
65300 mi broken camshaft damaged engine which waas replaced by Audi! 
62000 mi

US $9500
Check engine light came on. First told it was the fuel pump sensor. Escalated to fuel pump and went on to having to replace the engine with a used one.  
27000 mi Coil pack on one cylinder went bad. Car was missing and had no power. 
38000 mi Crankcase filter clogged, check engine light came on, replaced, light off, much happier wife 
65000 mi

US $450
Oil leak on valve cover, vacuum leak, idling rough, check engine light on. Repaired leaks, new plugs & filters, 
66000 mi

US $500
Check engine light, emissions problem, vacuum leak 
67000 mi

US $500
Turbo bypass valve was faulty, low power, rough idle. Once repaired the car runs better than ever. 
87300 mi

US $4200
Engine mount leaking fluid - replaced 
48000 mi Valves for one of the cylinders were not closing completely, causing the car to shake. A new cylinder head was installed.  A faulty ignition coil and throttle body were also replaced. 
55000 mi

US $85
Relief valve to air box was stuck open. Part was replaced. 
60000 mi

US $85
Fuel suction pump stopped working, shutting down the engine and preventing it from starting. Pump was replaced. 
86000 mi

US $80
Part in intake assembly needed to be replaced. 
143000 mi

US $300
Engine mounts replaced 
77000 mi

US $300
A leaking intake hose was found during routine oil change and inspection. Causing a turbo boost leak into manifold and oil pan. 
77500 mi

US $175
Failed PCV valve detected and replaced. 
18848 mi Accelerating on highway, power would cut for a couple of seconds and then resume. Check engine light appeared. Dealer is replacing camshaft and associated parts. 
18910 mi Fixed Issue from december. Received another check engine light, result was a misfire they replaced one of the coils. 
55800 mi Check engine light, boost control valve for turbo replaced 
81840 mi Car loses power when accelerating above a speed of 70km/h. Brought to dealer, was the same issue with the camshaft follower being worn and a new camshaft parts. All under an extended warranty by audi to all cars up to 160000km/10 years. 
29140 mi Pressure regulator valve malfunction resulted in check engine light. Part replaced and problem solved on same day in less than an hour. 
53000 mi

US $385
Turbocharger solenoid. A rubber piece had worn a hole, and the car was running a little rough and low on power. 
57000 mi

US $360
Intake valve and purge valve replaced. Wiring loosened on one of the solenoids that reside on the engine mounts; wires reconnected. 

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2006 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 6-speed manual FWD

47120 mi 4 coil packs replaced 
83000 mi

US $2033
came in for 85k service, technician discovered vacuum pump leak  
42000 mi Replaced low pressure sensor for fuel pump & replaced fuel filter 
63300 mi

US $100
Replaced thermostat 

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2006 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 6-speed manual AWD

87000 mi

US $200
Had to replace maf sensor 
101000 mi

US $1100
Two check valves were replaced, plus a minor oil leak in the value cover gasket. Additionally the 105K service was performed. 
148300 mi

US $3400
Finally replaced my clutch. Dealer said they last to about 85K normally, mine finally went around 148K. Considering I am the second owner, pretty impressive life for a clutch 
29000 mi Intake flaps were not working correctly. A common problem. 
40000 mi Replaced the CAT. 
49000 mi The deadly camshaft code 
111300 mi

US $25
Replaced bad coil pack. 
20894 mi Crankcase Ventilator (PCV)was replaced. There is a recall for this problem (recall CR). Symptoms: Car shudders/shakes while idling. RPM fluctuates by several hundred RPM while idling. Diagnostic scan showed multiple/random cylinder misfires. 
23340 mi Car was shaking violently. Dealer scans idicated that the diverter valve was faulty. 
34500 mi Intake manifold runner & PCV replaced. Replaced cam follower because it was worn. 
38440 mi

C $70
There was a hole in the exhaust system due to corrosion. A portion of the exhaust system was replaced. 
67000 mi

US $400
replace ignition coils 
74000 mi

US $2000
Replaced camshaft Replaced fuel pump 
59000 mi

US $400
Thermostat was stuck open and car would not get up to full temperature in the winter season. Heater would not work properly, especially at idle. 
66000 mi

US $200
Diverter valve replacement after taking into dealer for check engine light diagnosis. 
33000 mi Faulty IRMC valve replaced. CEL cleared. 
25000 mi

US $205
software update, no problems noticed with vehicle. 
34000 mi Power loss during hard acceleration. Unspecified software update. 
76000 mi

US $60
Engine temperature was not stable. Thermostat was purchased to repair problem but I was unable to perform the repair. 
67300 mi

US $200
Damage coolant flange, replaced plus all the brakes on the car 
79000 mi

US $2000
Intake camshaft replaced, cam follower replaced, hpfp replaced, timing belt replaced, water pump replaced. Noticed poor performance. Removed hpfp to inspect follower. Follower had a hole in it and hpfp shaft was pressing against the cam. 
15000 mi Water pump replaced 
25000 mi Pressure Control Valve (PCV) replaced 
30000 mi Diverter Valve replaced 
55000 mi Pressure Control Valve (PCV) replaced 
66000 mi

US $345
Engine temperature per the gauge was not reaching full temperature. Diagnosed as thermostat not closing, replaced by dealer. 
83000 mi

US $350
Driver's side motor mount was leaking, dealer replaced the one side. While in for an oil change the mechanic recommended I have the high pressure fuel pump inspected. Pump was removed/inspected and the cam follower had a hole worn through it. Pump, follower, cam shaft were all replaced. No charge to me. 
70000 mi

US $400
Leaking water pump. Replaced. 
74000 mi Hesitation under hard acceleration. Replaced cam and cam follower. 
81000 mi

US $590
Thermostat sticking - needed to be replaced 
94500 mi

US $900
replace engine mounts to pass PA state inspection 
76269 mi

US $842
Cam follower worn through, which damaged High Pressure Fuel Pump. Both replaced. Also had boost control valve replaced due to fault codes while car was in for repair. 
138000 mi

US $1371
Car was taken to dealership after previous repair to cam follower and intake cam was done by a local Audi specialist. Car's engine destroyed due to excessive wear of HPFP cam follower; which came apart in the engine causing serious damage. MIL light and oil pressure lamp came on, idling off and lack of power. Took to shop to find another cam follower had worn through causing major damage to both cams, cylinder head and cylinder wall. 
78000 mi Timing Belt replacement, 75,000 maintenance, Oil Change, Brake diagnosis (Brake Light came on). Either pads need to be replaced or brake fluid is low in the ABS reservoir or brake reservoir. 
104000 mi

US $3000
Problem 1 was a misfire on cylinder 4 (P0304) and a cooling system performance issue (P2181). Valve cover, spark plugs, ignition coils and coolant temperature sensor all replaced. New rear rotors and brake pads as well. Different mechanic to try to fix the misfire on cylinder 4 (P0304). Did engine diagnostics, inspected EVAP, DV, MAF sensor and intake system. Performed carbon cleaning. Replaced crankcase ventilation hose & vent, and fuel injector. Fixed 
79000 mi

US $420
Replace malfunctioning thermostat. 
100000 mi

US $1763
Engine control module failed requiring replacement. 
76880 mi Engine coils repaired under warranty 
77800 mi Hydraulic Engine supports leaked => replaced 
150700 mi Leak Detection Pump replacement. 
109740 mi

$150
Engine cooling system (radiator, water pump, thermostat, heater core, etc.), repair 
63000 mi

US $60
Checked and replaced Cam Follow for high pressure fuel pump. The cam follower was well worn but had not yet failed. Had it failed (hole worn into it), a replacement of the cam shaft would have been required. I check this part every 10-15k miles 
90000 mi

US $1580
Replace valve cover gasket 

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2006 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 6-speed shiftable CVT FWD

47120 mi

$1000
CHANGING THE CATALYTIC CONVERTER 

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2006 Audi A4 4dr Sedan

turbocharged 140hp 2.0L I4 Diesel 7-speed shiftable CVT FWD

65300 mi

$550
Flap intake valve fail 
72320 mi

$1
Tandem pump gasket failure. Replace only the gasket Engine intake manifould flap failure. Replace it 

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2006 Audi A4 4dr Sedan

255-horsepower 3.1L V6 6-speed shiftable automatic AWD

67580 mi

C $150
Fuel system problem. Engine light flashes 
120280 mi

C $900
Replace all fuel injectors 
192500 mi

C $700
Car was not coming up to temp, reading about 1/4 on the temp gauge instead of 1/2....this meant reduced capability for cabin heat in -40C. I replaced the thermostat and 3 main rad hoses as well as the serpentine belt while I had the car apart 
220080 mi

C $115
Valve cover gaskets leaking into spark plug cavity, also leaking on engine. Replaced gaskets. 
223200 mi Oil leaking from timing chain covers at rear of engine. Removed, cleaned old gasket material off, applied RTV type gasket sealant and reinstalled covers. 
16000 mi

US $75
Broken exhaust bracket - replacement bracket installed. 

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2006 Audi A4 4dr Sedan

255-horsepower 3.1L V6 6-speed manual AWD

24500 mi Carbon build-up in the engine. Root cause: most likely pampering of previous owner and/or improper fuel used without additives. Solution: use name brand fuel that contains the additives and techron liquid solution every 3,000 miles for the engine. 
67300 mi

US $541
Oil weeps from driver side valve cover gasket. 
43000 mi

US $1000
High pressure fuel pump 

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2006 Audi A4 4-door

turbocharged 4-cylinder manual AWD

71000 mi

US $1740
I found a TSB that described my issue of losing power on inclines. There is a TSB 2013147/4. He did replace a sensor first, audi recommendation. Cam follower looked like A pic, cam replaced. Replaced fuel pump. Oil metal was in the filter because of issue.  

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2006 Audi A4 2dr Convertible

turbocharged 170hp 1.8L I4 6-speed shiftable CVT FWD

43000 mi Low Coolant Warning Light - noticed liquid on garage floor. Called dealer, he suggested towing to dealership. Plastic plug was found cracked and replaced. 
61000 mi

US $1700
Leak in Oil pan. Replaced oil pan cover and seal. 
76000 mi

US $600
Coolant leak, flange replaced. 
77000 mi

US $1250
Water pump replaced again, after 18 months. It was first replaced by the previous owner before selling to us. 
24000 mi Coolant leak repaired. 
25000 mi Coolant leak returned a month after the previous repair, but did not have time to immediately take it into the shop. 

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2006 Audi A4 2dr Convertible

220-horsepower 3.0L V6 5-speed shiftable automatic AWD

69000 mi

US $50
Coolant reservoir cracked and leaked, replaced at home. 
53300 mi Secondary Air Pump was reporting leak. Recvd check engine code 

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2006 Audi A4 / S4

Engine not specified

138000 mi

US $125
Valve head gasket oil leak 

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2006 Audi A4 / S4 2-door

turbocharged 4-cylinder automatic 2WD

26000 mi

US $50
This would be trip 3...the ignition coil had to be replaced along with the overhead light bulb. 

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2005.5 Audi S4 4dr Wagon

340-horsepower 4.2L V8 6-speed manual AWD

61000 mi

US $90
Ignition coil broke. Got flashing CEL (indicates possible damage to cats if driven). Towed to dealer and all 8 ignition coils replaced under warranty. Dealer covered $100 of tow, rest was my responsibility. 

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2005.5 Audi S4 4dr Sedan

340-horsepower 4.2L V8 6-speed shiftable automatic AWD

52000 mi

US $1000
Replaced valve cover gaskets, valve cover caps etc etc. Now problem of flickering headlights. Great car to drive but pain in the butt to keep after warranty. Replaced fuel pump. 
40000 mi

US $400
Rough ride and rough idling 
79000 mi

US $900
Catalytic converters filled up. 
91000 mi

US $1460
Radiator Leak 

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2005.5 Audi S4 4dr Sedan

340-horsepower 4.2L V8 6-speed manual AWD

51000 mi Was idling rough with check engine light on, dealer replaced all 8 ignition coils under a recall. Fixed. 
126480 mi

C $1250
Fuel pump was replaced and by doing so the fuel lines cracked so they were also replaced 
99000 mi Timing chain guides / tensioners failed. Dealer quoted $10,000 to repair. TEN THOUSAND DOLLARS! Will most likely have to sell the car for parts. If you ask me, this is a MAJOR design flaw. I bought this V8 so it would last! The irony... 
44000 mi Catalytic converter replaced under warranty. 

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2005.5 Audi A4 4dr Wagon

turbocharged 200hp 2.0L I4 6-speed shiftable automatic AWD

84000 mi

US $120
PCV valve failed. Replaced with knock-off part.  
23000 mi

£400
The age old problem of the coolant flange seal failing. Replaced along with a minor oil seal. Car properly fixed this time. If you are leaking coolant from the back of the engine block on this age / engine, then it is the flange. 
49000 mi

£34
PCV valve failure. Idle very poor. Appears to be a common problem easily fixed with a replacement part. 

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2005.5 Audi A4 4dr Wagon

turbocharged 200hp 2.0L I4 6-speed manual AWD

42000 mi Check engine light came on and was resolved with a programing modification 
36000 mi

US $100
Oil seal leak in the engine 
39000 mi

US $50
Oil leak related to a cam shaft seal. The head was damaged around the seal so the head was replaced. 
49000 mi

US $50
Cruise control was not working due to sticky clutch switch 
30000 mi Intermittent error from "Intake Flap Motor." Dealer performed ECU flash. CEL came on again next day. Intermittent error from "Intake Flap Motor." Dealer replaced flap motor. 
44000 mi Broken motor mount was replaced under warranty. 
56000 mi

US $50
Difficulty filling gas tank. Dealer replaced fuel tank evaporation canister. 
71000 mi

US $730
Failing low pressure fuel pump and pressure sensor replaced. 
72500 mi Failing high pressure fuel pump and camshaft Failed turbo valve Failed coolant temp sensor 
77000 mi

US $600
Emissions sensor causing car to run rich -- replaced. 
81000 mi Low presssure fuel pump replaced. Fuel pump was replaced about 12 months ago under warranty and replaced again under warranty. 
96000 mi

US $943
Worn throttle body; replaced. 
107000 mi

US $1000
Replaced engine mounts 

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2005.5 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 7-speed shiftable CVT FWD

61000 mi Transmission Neutral Position Sensor Cooling System Thermostat 
37000 mi Two ignition coil packs where replaced under warranty. 
39000 mi Transmission Control Module - took more than a week to order and get from Germany. These things are matched to car's VIN number?!? A day or less to swap. Got CEL; drove straight to dealer; they took care of everything including identical car as loaner. 
41000 mi Cooling steel braided lines for Turbo where kinked and leaked both coolant and oil onto manifold creating a lot of smoke. Suspect damage done in previous repair... 

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2005.5 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 6-speed shiftable automatic AWD

143000 mi

US $300
Carbon buildup on intake caused repeated misfire on cyl.4, POOR performance, POOR mpg, high sulfuric-exhaust odor (NOx). Intake Cleaned, #4 fuel injector replaced, 1 ignition coil replaced, plugs gapped/cleaned Root:CARBON BUILDUP 
145500 mi

US $150
Charge Air/Intake Hose Leak; Replaced All Charge Air Hoses & Lower PCV Hose 
149000 mi Worn intake camshaft timing chain & tensioner causing rattle on startup and after engine reaches operating temp; Oil leak from rear vacuum pump assy; #2 Cylinder misfire as per OBD; Small vacuum leak still persists as per OBD Coolant leak from rear of engine @ water flange; 
80000 mi

US $3400
complete engine failure due to sludge build up 
36449 mi Left Brake Light and Camchain Tensioner 
48000 mi Crankcase vent regulating valve(PCV). 
52000 mi

US $50
Corrosion on Cam Lobes (Replaced Camshaft) Valve Cover (Replaced) Intake Flap Motor(Replaced TSB:2016868)  
57000 mi

US $50
Water Pump Replaced Right Engine Mount Replaced 
61000 mi

US $50
Low Pressure Fuel Sensor 
72000 mi

US $256
Turbo Bypass Valve(Diverter Valve)Replaced with Revision D Part Number. 
76300 mi

US $420
In-Tank Fuel Pump + Seal + Coupling Nipple (Replaced: 8E0919051CQ, 1J0919133B, 8E0201263G) 
83000 mi

US $165
Oil Cooler Gasket Ignition Coil(Cylinder #1) 
84000 mi

US $498
Coolant Hose Flange(06D121132C:Back of engine) and related hardware. CTS, clip, small hose, x2 hoses, x2 grommet. 
70000 mi

US $495
Check engine light, suddenly sluggish up hills. Replaced turbo cutoff valve. Unclog leak detection pump and replace its hose. 
74700 mi Diagnostic for sluggish performance. No problem found. Symptom persisted for a couple of weeks. Not currently an issue. Expect full resolution at next service (major- plugs, etc.) 
83000 mi Replace PCV, also a TSB. 
62000 mi

US $336
Failed crankcase pressure regulating valve. 
65000 mi

US $1000
High pressure fuel pump cam follower face was worn completely through resulting in damage to the cam lobe. Cam and follower were replaced. 
92000 mi

US $200
Rusted exhaust pipe clamp. Very noisy. Replaced clamp and cleaned up pipes. Quiet afterward. 
20000 mi Leaked coolant in cold weather. Dealer replaced leaking engine flange under warranty. 
57000 mi

US $85
Check engine light was on. Scanned the codes, indicated boost pressure too low. Turbo Recirculating valve (diverter valve) diaphragm was torn. Replaced valve. 
85000 mi

US $150
Check engine light came on, car idled high. Replaced broken PCV valve 
95000 mi

US $100
Had to replace worn high pressure fuel pump intake cam follower after finding metal shavings during oil change 
109000 mi

US $308
Check Engine light on. Intake Manifold Control Motor (adjuster) had failed. Obtained part from dealer and replaced it myself. There is a warranty on this part for some VINs but not mine. 
110000 mi

US $1250
Timing belt replacement, including water pump and tensioner. Replaced thermostat; was stuck open. Replaced accessory belt pulleys due to excessive wear and noise. 
133700 mi

US $75
Code p0299. Replaced diverter valve 
156300 mi

US $2100
Broken downpipe and hole in y pipe 

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2005.5 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 6-speed manual FWD

70000 mi

US $500
Fuel distributor control unit needed replacing. 

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2005.5 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 6-speed manual AWD

87000 mi

US $4782
Fuel valve eaten by engine; required new top end, fuel pump, filter. 
26000 mi

US $96
Cold start problems. Car hesitated before cranking over. Only happens in sub-freezing temp. Dealer found a TSB and reflashed ECU to a newer version. Problem solved. 
41000 mi

US $50
turbo intake valve not working as intended. car shuddered at low RPM low speed. Dealer fixed under extended warranty 
45500 mi

US $50
Check engine light comes up for a day or two than went away. Dealership measured fuel pressure & replaced sensor (under CPO warranty). CEL came back on after I got the car back. Took back to the dealership and they replaced the fuel pump. 
56000 mi

US $100
thermostat replaced 
48000 mi Turbo switch valve went bad. 
96000 mi

US $1600
Thermostat beginning to malfunction. I replaced it before warm weather/heavy driving, $828. 
126000 mi

US $1000
New fuel pump, replaced sensors 
127300 mi

US $900
Oil leaks 
31000 mi Engine ran rough at start up - like only two or three cylinders firing. Three restarts had same problem. After waiting a few minutes another restart had a smooth engine but the light was on. Apparently there was a TSB on this faulty "ventilation valve". 
89000 mi CEL, software fix paid for by CPO warranty. 
96000 mi

US $50
Dealer replaced FSI fuel pump, cam follower and camshaft per TSB (original manufacturer defect) after check engine light code found. 
65720 mi Buildup on intake valves resulting in misfires on cylinder #3 during first five minutes after a cold start. 
70060 mi

C $25
Clutch switch sensor replaced. 
73160 mi Coolant thermostat stuck open, started to act up the first winter after the warranty expired to the point I had very little heat in the winter. 
84940 mi

C $520
Replaced failing high pressure fuel injector on cylinder #3 
99200 mi

C $30
Was getting subtle misfires for a month, then it gave up due to a coilpack failing. Tow home cost me $500 because of a $30 part failing. 
99800 mi

C $25
Another coilpack failed. Same one from the recall back in December 2009. Had spare coilpack in car this time to avoid being stranded on the side of the road. 
112840 mi

C $800
L/R motor mounts replaced, hood strut, oil change 
113460 mi PVC replaced 
102000 mi

US $950
Intake flap motor failed. It's not affecting drivability fortunately. I plan to replace it soon, haven't had the time to drop off the car. It's emission related but my fuel mileage has suffered a bit. 
20000 mi coolant leakage 
40000 mi Replaced the PCV valve under warranty. Also did the 35k mile service. Spark plugs replaced. 
51000 mi Replaced the turbocharger K03 under warranty @ 51,000 miles. Did the 45,000k service. 
66300 mi Purchased high pressure fuel pump and filter from the dealer and then installed at Rennart. Date is 8/24/2009 Replaced the fuel pressure sensor - Audi dealer - 8/4/2009 
73000 mi

US $150
Valve replaced, fuel line 
89500 mi

US $550
Reflashed ECU with Revo stage 1 $550 - 8/12/2011 
96000 mi Changed the high pressure fuel check valve with an upgraded unit. Did not solve fuel cut issues, may need larger fuel pump due to engine software upgrade. 
27000 mi  
86300 mi

US $300
Replaced purge valve 
91000 mi

US $500
Charcoal Canister replaced 
105500 mi

US $90
Exhaust system hanger replaced 

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2005.5 Audi A4 4dr Sedan

255-horsepower 3.1L V6 6-speed shiftable automatic AWD

62000 mi

US $650
Oil leaking from manifold. Extensive labor charges incurred to repair a $15 gasket that prematurely failed. 
69700 mi

US $300
Engine is slow to turn over. Replaced fuel sensor and fuel filter. Declined throttle body and injection cleaning service. Problem still exists 
73000 mi Rear Cam oil leak Valve cover oil leak Rear Differential leak 
73000 mi Rear cam oil leak not repaired. 
93700 mi

US $950
Oxygen sensor replaced, high pressure fuel pump replaced, vacume hose replaced. Engine Light on dashboard stays on. Computer diagnosis indicates fuel pump repair required. 
95700 mi

US $850
Broken arm on intake manifold air dam In-tank fuel pump was not providing proper pressure of fuel feeding to engine 
102300 mi

US $163
Replace Fuel Tank Seal 
106000 mi

US $709
Replace Right Bank cam solenoid, reset valve timing, replace valve cover gaskets. 

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2005.5 Audi A4 2dr Convertible

turbocharged 170hp 1.8L I4 6-speed shiftable CVT FWD

80000 mi

US $70
belt tension pully bearing started squealing. changed pully 
80000 mi

US $1600
replaced turbo 

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2005.5 Audi A4 / S4

Engine not specified

124000 mi

US $50
Exhaust clamp 
69000 mi

US $439
Secondary radiator coolant leak. Radiator was replaced. 

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2005.5 Audi A4 / S4 4-door

turbocharged 4-cylinder manual AWD

76500 mi

US $250
fuel pump failure; replaced pump under extended warranty and fuel filter out of pocket expense. 

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2005.5 Audi A4 / S4 / RS4

Engine not specified

80000 mi

US $1200
One of the fan blades got loose causing noise against the radiator, apparently is a frequent complaint(?), Fan was replaced. 
77000 mi

US $1300
HPFP went bad. Needed to replace it. 
76000 mi Coil pack overloaded and caught fire. Replaced as a recall at no cost. 

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2005 Audi S4 4dr Wagon

340-horsepower 4.2L V8 6-speed shiftable automatic AWD

75000 mi

US $250
Intermittent starting problems due to faulty engine speed sensor. Repair pending approval by extended warranty provider. valve covers leaking oil. Also peeling and blistered paint. Extended warranty provider denied coverage because leakage "minimal," so not fixed. Upper radiator hose leaking coolant. repaired after approval for repair by extended warranty provider. 
76300 mi Crank position sensor replaced  
106000 mi

US $1200
check engine light, engine began misfiring. Diagnosed as failed plugs and replaced all 8 spark plugs. Replaced valve cover gaskets to address worsening oil weeping. 
47000 mi

US $1600
Replaced serpentine belt, pulley and tensioner Replaced valve cover gaskets 
51020 mi Aux cooler pasenger side changed due to leaking. 

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2005 Audi S4 4dr Wagon

340-horsepower 4.2L V8 6-speed manual AWD

89000 mi

US $1000
Fuel Pump 
95000 mi

US $65
Check Valve (Y-Valve) 
93000 mi

US $2125
Valve Stem Seals Timing Components 
93000 mi

US $3500
Cylinder Heads 
94000 mi Bad Tensioner 
96000 mi

US $150
Crank Position Sensor? 
58000 mi Coil pack failure, all coil packs replaced under recall notice. Car was due to go in for the recall 7 days later, but one coil pack decided to fail prior to the repair appointment. 
103000 mi

US $300
Replace valve cover gaskets (leaking bad), replace serpentine belt and related components as preventative maintenance. 
83000 mi Slight smell of coolant when heat is on. 
92000 mi

US $1100
Valve cover gaskets need replacing 
100500 mi

US $1000
Oil gasket in V of engine was leaking. Need to take off throttle body replace oil gasket 
80600 mi

C $2875
Clutch, flywheel, clutch release bearing replaced. Replaced with B7 parts, as they are considered an upgrade on a (B6) S4 with higher clamping load and a slightly lighter flywheel. 
99200 mi

€450
part of wiring loom to ecu needed replaced water damage 
110980 mi

€5000
cam timing out, replace a whole bunch of parts, engine removal required to complete 

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2005 Audi S4 4dr Sedan

340-horsepower 4.2L V8 6-speed shiftable automatic AWD

67000 mi

US $400
Both front O2 sensors showed varied fuel trims 
68300 mi

US $55
Coolant overflow tank devolved a small crack at the top and was leaking coolant/steam after short drives, replaced coolant tank with Genuine Audi unit at a cost of $55 shipped. 
68000 mi Pass cat replaced under emissions warranty. 
95000 mi

US $360
Replacement of Crankshaft Position Sensor. Intermittent no-start condition and a P0322 ECU code. 
44500 mi

US $220
Replaced a Coil Pack 
47000 mi Dealer replaced seven coilpacks due to recall. 
62000 mi Water pump replacement pending when sold. It was leaking a small amount of coolant, about a 3-4 oz. per week. 

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2005 Audi S4 4dr Sedan

340-horsepower 4.2L V8 6-speed manual AWD

56900 mi

US $120
After starting the (cold) motor, it rattled for about 2-3 seconds. Did an oil & oil filter change and changed from 5W30 to 5W40. 
98000 mi

US $1428
Slow loss of engine coolant, but no drips or puddling. Turned out to be passenger side auxiliary radiator was coming apart at the seems, so had it replaced. Check engine light coming on, then going off a few days later. Trouble codes were for misfire in cylinders 1 & 2. Ignition and Fuel systems both checked out fine, but exhaust check showed passenger side catalytic converter was very clogged. car into dealer for 95K mile service. They found DTC's for failing radiator fan control module. However the car has not been running hot or giving any indication of issues with cooling fan. Dealer estimate of $703 to replace. 
98000 mi

US $2200
passenger side down pipe / catalytic converter severely clogged, causing DTC's and bad engine misfiring. Replaced entire exhaust system with stainless after market system for price of just the 1 factory down pipe. 
98000 mi

US $30
Plugs were badly fowled due to clogged down pipe on passenger side. The exhaust system had been replaced but afterwards the engine still did not run smoothly, so all spark plugs were replaced, which fully resolve the issue. 
56420 mi Exessive oil consumption, car needs a new short block according to Audi. Audi has denied warranty but dealer paying since problem documented and started at 41k. 
56420 mi

C $2000
excessive oil use, engine replaced. 
60140 mi

C $2000
CEL codes P2097 Description: Post catalyst fuel trim system too rich P2098 Description: Post catalyst fuel trim system too lean audiwarranty.blogspot.com 
61380 mi Dealer has not been able to diagnose the problem, car still throwing codes after 200 to 400kms of driving. See my blog at http://audiwarranty.blogspot.com 
61380 mi Problem still ongoing, now starter is failing, that will be next repair. http://audiwarranty.blogspot.com 
63840 mi Actuator was stuck open and car would not come up to temperature, shop replaced faulty actuator problem solved. possible cause because car was apart for a long time waiting for short block at dealer for oil consumption. 
67240 mi

C $400
Failed crankcase regulator valve, caused oil leak from valve cover gaskets. Replace regulator will wait and see if valve cover gaskets need to be replaced. 
81000 mi

US $19000
Engine and clutch replacement. Engine had a crack in cylinder wall 1. Clutch replaced while engine was replaced as preventitive. No previous clutch failure. 
104500 mi

US $20
coolant expansion tank hairline fracture and leak 
34700 mi

US $50
Burning oil odor - valve covers replaced under warranty. 
47300 mi

US $500
Mass Flow Sensor had to be replaced 
59300 mi

US $1000
Crank position sensor replaced 

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2005 Audi S4 2dr Convertible

340-horsepower 4.2L V8 6-speed shiftable automatic AWD

31000 mi 4.2 liter motor makes terrible grinding noise when starting. Audi Tech Bulletin advises this is normal and caused by a slow adjusting camshaft chain adjuster. Problem so bad no dealer will trade, and, no buyer will purchase car. 
32000 mi Loss of perfromance, would not shift out of 1st gear, stability control intermittent, no transmission safety switch (could shift into gear without pressing brake). Sensor replaced. 
41000 mi

US $550
Replaced valve cover gaskets 
70000 mi

US $300
various hoses were leaking oil 
90000 mi

US $500
Replace valve seals Fuel valve at gas tank failure 
113000 mi

US $350
Serpentine belt failed due to oil leak on engine cam covers. Doing that fix leter. 
49000 mi

US $85
Replaced coilpack 
55000 mi

US $100
replaced ECM relay 
51000 mi

US $1200
oil leak 

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2005 Audi S4 2dr Convertible

340-horsepower 4.2L V8 6-speed manual AWD

52700 mi Crankcase ventilation valve replaced to resolve excessive oil consumption and leak from one head gasket. 
53940 mi Mild oil leak from headgasket, not severe enough and problem may be resolved because of replacement of crankcase ventilation valve. 
55180 mi

C $1100
Head gaskets in both banks of cylinders were replaced to correct oil leakage. 
54700 mi replaced all ignition coils 
64000 mi

US $700
alternator belt & tensioner 
94700 mi

US $390
Low oil pressure warning light came on due to faulty switch. 
102000 mi

US $5200
valve cover gaskets, thermostat, radiator hoses, misc gaskets, drive belt 

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2005 Audi A4 4dr Wagon

turbocharged 170hp 1.8L I4 6-speed manual AWD

88000 mi Ignition coil packs failed on me - fourth one in two years. 
117700 mi stuttering upon hard acceleration 
123000 mi

US $12
Small coolant leak 
127000 mi

US $760
Hoses were disintegrating and falling off. 
143000 mi

US $70
Valve cover rubber gasket seal replacement as oil was leaking into the spark plug holes. 
162000 mi

US $450
Coolant leak at the front of the engine. Also changed timing belt at the same time as it was in the same area. 

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2005 Audi A4 4dr Wagon

turbocharged 170hp 1.8L I4 5-speed shiftable automatic AWD

52000 mi Replaced all ignition coils. 
70000 mi

US $2000
Replaced defective seals and vacuum hoses 
93000 mi

US $800
Temp sensor and cracked cooling control housing had resulted in lost coolant Significant ongoing oil loss. compression test passed. Crankcase ventilation/pressure system failure suspected. 
102000 mi Still losing oil when last had it. 

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2005 Audi A4 4dr Wagon

220-horsepower 3.0L V6 5-speed shiftable automatic AWD

49000 mi Engine Coolant began leaking all over garage floor. Car was immediately driven to local Audi dealer. Same problem of Trip 1: Engine coolant leak that was unsuccessfully diagnosed/repaired on the original trip to the dealer. 
55000 mi Ignition coil failure. Replaced all six ignition coils. 
100000 mi

US $185
Thermostat went out 

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2005 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 6-speed shiftable CVT FWD

85000 mi

US $650
leaking engine mount 
89300 mi valve cover and cam seals leaking; very minor oil leak so I won't repair now. 
90000 mi valve cover, cam seals, and broken hoses replaced to eliminate leaking oil and burning oil smell in interior. 
96000 mi

US $150
Check engine light indicated that cooling system temperature sensor had failed. It was replaced. 
105700 mi

US $650
Engine mounts replaced 
115000 mi

US $597
Flange on rear of cylinder head leaking coolant. Coolant flange replaced as well as temp. sensor and hose from flange to heater core. 
125500 mi

US $70
Ignition coil died. I replaced three by myself (I had done another a few months ago). Took me 10 minutes. 
70000 mi

US $2000
Car had issues with the MAF and O2 sensor 
80000 mi

US $1400
Transmission Control Module failed, caused a check engine light. Covered under california emissions until 70,000 miles I am at 78,000. 
51700 mi

US $2095
Thermostat, both electrical fans and control unit replaced. 
75000 mi

US $1935
Coolant flange replaced. Valve gasket replaced. 
64000 mi

US $150
ignition coil packs 2 of 4 failed. 

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2005 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 6-speed manual AWD

28520 mi

C $386
regular maintenance plus replacement of two engine coils 
72000 mi Loud rattles from under the car, drivers side. I'd hear it at about 2500-3200 rpm's. Turned out to be a busted support rod connecting/supporting both mufflers. The rod was welded back together and the problem resolved. 
75000 mi

US $250
Oil leaks found in driverway after vehicle purchase. Valve cover and tensioner gaskets replaced.  Passenger side motor mount replaced due to leak. 
76000 mi

US $330
Worn coolant flange and o ring which was a result of a bad valve cover gasket that leaked oil down over the flange over time. Coolant temp sensor was also replaced. 
92000 mi

US $442
Driver's side motor mount replaced due to leakage of all hydraulic fluid. I did not notice much driving, I saw oil spots in the driveway and took the car in since the timing belt was replace about 2 weeks prior. 
63000 mi

US $10
replaced leaking coolant bleeder screw 
69000 mi

US $170
Timing belt,water pump and tensioners 
94000 mi

US $5000
Turbo blew 
52000 mi

US $30
Replaced 1 Coil Pack 
84940 mi

C $2200
throttle body, intake gasket, and exhaust gas hoses replaced. 
48000 mi Ignition coil on cylinder 1 was replaced. Cost $0.00 since it's under warranty. 
76000 mi

US $50
Leaking coolant flange, replaced by dealer under warranty, out of pocket cost $50. 
80000 mi CEL Light went on for P0420 code. Replaced O2 sensor and had a vacuum leak and it fixed it. 
85000 mi

US $50
EPC light came on causing failed attempts at starting the car and rough idle. 

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2005 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed shiftable automatic AWD

104000 mi Engine speed sensor 
65000 mi

US $300
Ignition coils and spark plugs replaced due to multiple check engine instances flagging cylinder misfires. (in the end valve cover seal) 
84000 mi

US $100
New spark plugs due to continued misfiring. (in the end valve cover seal) 
88000 mi

US $700
Valve cover seal replaced because it was leaking to spark plugs causing previous failures. 
121000 mi

US $500
Cooling fan and ac condenser fan replaced 
126000 mi

US $2150
Thermostat and housing, $350 All vacuum lines under the intake manifold, $600 Crank Shaft Tensioner seal, $1200 
130000 mi

US $60
PCV Valve 
145000 mi

US $3400
Cracked cylinder head 
130500 mi

US $453
Coolant flange at rear of engine needed to be replaced due to cracking. 
142000 mi Bad temp sending unit for coolant. 
Mileage unknown warranty Coolant sensor replaced, ignition coils replaced 
Mileage unknown/Warranty Thermostat replaced 
39012 mi Warranty Ignition coil replaced 
42928 mi Warranty Replaced coil TOWED 
Certified used car warranty Replace catalytic converter, replace fuel tank, replace coolant plug 
41000 mi Coolant leaked below minimum level. Coolant warning light on. Added water to system and drove to dealer. Pressure test found coolant flange seal leaking. Coolant flange seal replaced. 
65000 mi

US $675
PCV valve was replaced. Caused rough idle and check engine light to flash 
91000 mi

US $400
crank shaft sensor need to be replaced. was intermittently stopping the car from starting 
42300 mi Water Pump replaced under warranty. Pump was working but was making a noise. 
46000 mi

US $400
A Coil Pack shorted and caused the check engine light to come on. Since the incremental cost was marginal I had all four coil packs replaced. 
58000 mi

US $1200
Replaced Radiator due to pin hole leak.  

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2005 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed manual FWD

59000 mi

US $50
Original turbocharger was going bad, & was replaced under certified pre-owned warranty without any further issues. 
69000 mi

US $50
Coolant hose adapter was cracked. 

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2005 Audi A4 4dr Sedan

220-horsepower 3.0L V6 6-speed manual AWD

124000 mi

US $550
Oil leak from valve cover gasket 
34720 mi 3 coil packs needed replacing. 
50840 mi

C $100
Water Pump replacement and 100000 KM maintenance Valve covers seeping oil 
74380 mi

C $3000
Valve cover gaskets replaced 
79360 mi

C $836
CEL - misfire on cylinders 2,3,6; replaced colipacks 
90520 mi

C $300
G62 Coolant Temperature Sensor replaced. MIL indicated low signal for sensor. 
94240 mi

C $600
Engine misfiring - MIL ON; 4 coilpacks diagnosed as faulty. replaced all 6 coilpacks on engine 

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2005 Audi A4 4dr Sedan

220-horsepower 3.0L V6 5-speed shiftable automatic AWD

65000 mi

US $30
One of the ignition coils failed. I was close to the dealership and was able to drive there. A total of four coils were replaced under manufacturer's recall. the remaining two coils had already been replaced under warranty. 
86000 mi

US $2150
Oil leaks from camshaft covers and sump. Gaskets replaced. Leaking coolant line, the subject of a TSB is leaking. Repair requires expensive intake manifold removal to get at source of leak so I've decided to live with the problem. 
88000 mi

US $850
Fuel pump failed while car was on freeway. 
90000 mi Significant coolant leak from cross pipe located under intake manifold. Will live with problem for time being. 
92000 mi Major coolant pipe had become brittle and degraded from heat and was leaking. Why Audi choose to use short life span parts baffles me. Pipe is under intake manifold so a heavy labor charge to replace it.  
116000 mi

US $400
Car has developed a bad oil leak from a crack in the upper sump. No known cause. Since the proper repair is an engine out job I'm investigating alternatives. JB Weld didn't work. 
70000 mi

US $700
Rear coolant crossover pipe. 
88000 mi

US $400
Crossover coolant pipe. Update, late October: already leaking again. "O"-ring going bad. It's about a 1-1/2 hour repair job for a $40 part and very tedious to get behind the engine block. 

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2005 Audi A4 2dr Convertible

turbocharged 170hp 1.8L I4 6-speed shiftable CVT FWD

53000 mi

US $250
Check engine light came on, code was for new transmission, warranty co. asked to clear code and see if check engine light returned before replacing transmission. Check engine light came back on at 25 miles, the problem was not a new transmission, but a sensor, dealer ordered the part and I drove my car home to wait for it. The part came in, the dealer repaired it, the extended warranty paid 100%, less the $250 deductable. 
66000 mi

US $450
Leaking valve cover gasket, fouled the spark plugs. Replaced valve cover gasket and engine breather hoses to oil separater which had crumbled apart during the gasket repair.  
83300 mi

US $400
Check engine light came on, essentially needed a tune-up, new plugs, etc. and a lecture on using premium gas, NOT regular unleaded. 
84000 mi

US $95
Took the car in for check engine light, re-set the check engine light, and the warning has not returned. 
85000 mi

US $345
The dreaded intermittent electrical problem. With no rhyme nor reason the dash display goes dark, the A/C ceases to work and the radio turns off. Radio can be turned on again, but not the A/C. Shop replaced ignition switch, problem not fixed 
89000 mi I am taking the car back to the original shop to take care of the ongoing check engine light and the abs system randomly coming on, I anticipate the repair being done this month (Dec.) 
89000 mi Trip was to work on check engine light, abs brake light and traction light from previous trip, ec sensor was changed for the third time, to no avail, as soon as warning lights are cleared, they reappear.  
89000 mi Check engine light still on, went to dealer discussed my options with the service tech, chose not to go through another round of diagnostic tests, traded the car in on a 2012 VW Eos. 
44000 mi

US $475
Right motor mount leaking fluid. 
49000 mi

US $5600
Car overheated. Long block replaced by dealer at owner expense at 49,000 miles (post warranty). 

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2005 Audi A4 2dr Convertible

220-horsepower 3.0L V6 6-speed shiftable CVT FWD

21405 mi All ignition coils replaced. Warranty. 
49160 mi Ignition coil #5 replaced. Brake light switch defective, replaced, was causing burnt bulbs. 
49973 mi Transmission control module replaced. Engine felt sluggish. 
67000 mi

US $2700
Water pump leak, replaced. At same time did timing belt (due at 65k anyway). 
73000 mi

US $150
Remove and replace coolant tank due to leak. 
77000 mi

US $387
CEL illuminated and flashing. R&R spark plugs and 6 ignition coils. 
85000 mi

US $2250
Y-pipe behind engine cylinder block cracked and leaking coolant. Replaced. 
88000 mi

US $3700
Cylinder 5 coolant weeping, engine rumbled on start to clear coolant. Cylinder head 456 warped (probably from factory) and heating and cooling exacerbated over time, making leak worse. Replaced head. 
96000 mi

US $4000
Ecu was sending erratic signals to fan control unit, which burned out and caused car to over heat, also ruined secondary ac fan. 
151000 mi

US $3600
Coolant sensor in rear of engine leaking. 

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2005 Audi A4 / S4 4-door

4-cylinder automatic 2WD

48360 mi

$50
Ignition coil unserviceable on cylinder 3. Coils on all cylinders replaced 

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2005 Audi A4 / S4 / RS4 4-door

turbocharged 4-cylinder manual AWD

99200 mi

$35
Problem with crankcase poison sensor.(G28) 

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2004.5 Audi A4 4dr Wagon

turbocharged 170hp 1.8L I4 6-speed manual AWD

51000 mi

US $85
Turbo inlet hose (aka TIP) torn and letting in un-metered air. Replaced with a spare. 
54000 mi

US $64
Engine speed sensor failed; new sensor ordered from dealership and self-relpaced. 

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2004.5 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 6-speed shiftable CVT FWD

57000 mi

US $1550
Replaced timing belt. It was 10 years old and cracked from the Arizona heat. 

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2004.5 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed manual FWD

52000 mi fuel pump was making a loud humming noise which was diagnosed to come from the rear passenger side. dealer replaced it no problem, was recalled on 03 models so not surprising to see it happen on 04.5's 
106000 mi

US $100
Coolant flange is leaking. Observed when coolant levels dipped low after refilling. Common problem and may even be a wear item due to seal failing. 
117000 mi

US $118
vacuum system was malfunctioning causing high vacuum leading to low oil pressure at low RPM 
129000 mi

US $80
Previous coolant flange repair was not successful and it was still leaking. Replaced yet another time, hopefully stops coolant leak. 

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2004 Audi S4 4dr Wagon

340-horsepower 4.2L V8 6-speed shiftable automatic AWD

42000 mi

US $50
Fluid leak required replacement of oil pan. Part is cheap, but access requires full engine removal in this car. Repair was covered under CPO warranty. 
49000 mi

US $50
Automatic gearbox manual gear selector would not upshift. Electronic board ordered under extend warranty 
92000 mi

US $1000
Fuel pump failed. Fuel filter also replaced. 

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2004 Audi S4 4dr Wagon

340-horsepower 4.2L V8 6-speed manual AWD

115000 mi

US $7500
Main timing chain guide rail broke - requires removal of engine OR transmission to repair. Predictable failure at 100K miles, prefaced by noise on startup. Replaced clutch at same time since that was planned and tranny was out. 
24800 mi

C $1000
Driver's side aux rad damaged by rock, slight coolant loss over 1 month. Replaced radiator. Red oil pressure warning light. No other symptoms (ie. no rough idle, no low oil level, etc.). Towed to dealer - unable to reproduce or diagnose. Replaced oil pressure sensor / transmitter at owner's request. 
26040 mi

C $140
Intermittent lean code. Every other month, unable to diagnose, so code cleared. 
50220 mi

C $600
Passenger aux radiator damaged by rock and slowly leaking coolant. Not an uncommon issue and exacerbated by winter gravel in Alberta. Replaced part. 
55800 mi

C $600
Leaking valve cover gaskets; replaced. 

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2004 Audi S4 4dr Sedan

340-horsepower 4.2L V8 6-speed shiftable automatic AWD

110000 mi

US $45
Oil pressure sensor physically broke, allowing large amounts of motor oil to leak through the small plastic fitting ONLY while running. 
65000 mi

US $700
Intake gaskets. 
77300 mi

US $5600
Rear main seal needed replacement. 
39000 mi

US $1200
Driver side auxiliary radiator and associated hose(s). 
166000 mi

US $760
Fuel pump failed. 
106000 mi

US $400
replaced valve cover gasket on both sides, was leaking oil, 1 quart every 100 mile or so 
79000 mi Secondary air system problem emissions 
37820 mi Replace one coil. 
42160 mi replace one cat 
49600 mi

C $1500
leaking aux rads 
94000 mi

US $3500
Catalytic converters stopped up and flex couplers blew out on exhaust mid pipes. Replaced mid pipes (required) and cat back (pro actively). Opted for aftermarket parts reducing part costs about 50%. 
94000 mi

US $425
MAF element cover came off and lodged in throttle body MAF replaced. Luckily cover didn't enter intake or engine. 

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2004 Audi S4 4dr Sedan

340-horsepower 4.2L V8 6-speed manual AWD

103000 mi

US $121
Replaced: 079103483K (1) 079103483L (1) 077103487B (2) 079103487A (3) 049103491 (4) 
120502 mi

US $25
Fuel pump went bonkers, car wouldn't start, left me stranded @ grocery store for 20 mins before it allowed the car to start to limp home. The only forewarning was improved gas mileage the previous 3 fill-ups. Replaced with OEM B7 S4 exhaust hangers to pull muffler tips tighter to the bumper reliefs. 
127740 mi

US $138
A month prior to the repair date, the fuel level would not read more than 3/4 full, with the tank topped off. Culprit was the pass-side fuel level sending unit. Repair req'd using the fuel level down to be able to reach the sensor. 
128000 mi

US $64
Cyl 8 spark plug fouled with oil deposits. Cyl 7 also showed oil deposits, but not as much as cyl 8. 
92000 mi

US $700
Leaking radiator replaced. 
97000 mi

US $1500
Oxygen sensor failure. 
157000 mi

US $300
Replace leaking valve cover gaskets 
84000 mi

US $25
Coolant overfill tank cracked and leaking. 
84000 mi

US $150
Valve cover gaskets replaced. 
90000 mi

US $300
Accessory belt and tensioner bad. Both replaced 
103000 mi

US $9000
Camshaft adjuster. Only way to repair is to pull the engine Valve spring failure on Cyl 3 - engine is going to be replaced 
108000 mi

US $35
Rough idling - dealer couldn't replicate and no DTC warnings found 
114000 mi

US $3200
Radiator had slow leak. It was replaced. 
122500 mi

US $600
Noticed smell of burning oil. Valve cover gaskets leaking, had them replaced. 
129000 mi

US $100
Coolant reservoir tank cracked and leaking, replace failed part. 
19840 mi Changing block motor due to invalid boost pressure in cylinder 4 & 8 caused by malfunction in cylinder 2. Approx. cost by the dealer and audi 20k$. 
159000 mi

US $520
Fuel vapor canister replaced after CEL. 
186000 mi

US $900
Removed and replaced serpentine belt due to wear. Replaced coolant reservoir. It had small crack in it, and coolant was crystalizing on the outside of the tank. 
206000 mi Developed a radiator leak in the secondary radiator on the front passenger side of the car. It needed replacing. 
21000 mi

US $310
Mass Air Flow was replaced. 
39000 mi The accessory belt for the alternator broke. Replaced belt and performed preventive maintenance by replacing accessory belt pulley and tensioner. Additionally, the spark plugs were replaced. 
60000 mi

US $125
I noticed a leak in coolant, a pressure test was conducted but no leak found, found to be a possible overfill issue. 
66000 mi Oil/coolant leak. 
50500 mi

US $940
One of aux radiators started to leak and needed to be replaced 
69000 mi

US $950
Middle muffler rotted through. Had to change the exhaust from after the cats 
58000 mi

US $500
Valve cover gaskets. Coolant expansion tank. 
63000 mi

US $1300
water pump/thermostat replaced Replaced engine mount and snub mount. 
78000 mi

US $650
Heater hose leaking. Required removing the trans and cutting out the catalytic converter. 
120000 mi Timing chain guide failure, caused the chain to skip tooth, bend valves, then scorch the cylinder walls and piston tops. 
20000 mi Adjusted manifold bolt - fixed rough idle. no other problems in 4 years. great car 
73000 mi

US $200
Sand blast and paint inside of valve covers and replace gaskets 
75000 mi

US $699
coolant sensor replaced, fuel filter replaced, inside of valve covers sanblasted and painted Still failed to start when warm, replaced the cam position sensor 
88000 mi

US $200
reset idiot light. replaced o2 sensor 
16000 mi oil leak pass side valve cover 
86000 mi

US $3000
Warped valve covers, 
88000 mi

US $450
Faulty crank position sensor 
32700 mi

US $30
after a 1000k trip, i noticed that the fuel pump was making a loud mechanical noise on initial start up and ended after 30sec. , googled the problem, fuel pump VS fuel filter..?? replaced the fuel filter and fuel pump noise disappeared. 
43000 mi

US $2300
Both aux radiators were found to be leaking coolant on the back side. Had them pulled and replaces with OEM parts and hoses. small coolant leak on both right and left front of car. both right and left auxiliary radiators rusted because of debris from low air intake position , design flaw.! full coolant replaced , radiator hoses replaced. 
42000 mi

US $1600
small coolant leak on both right and left front of car. both right and left auxiliary radiators rusted because of debris from low air intake position , design flaw.! full coolant replaced , radiator hoses replaced. 
95000 mi

US $700
Starter motor replacement 
86000 mi Valve cover gaskets. serpentine belt, pulley, & tensioner TSB 
75000 mi

US $100
Oil leaking around valve covers 
52000 mi

US $350
Passenger side auxilary radiator.  
52000 mi

US $60
Ignition Coil went bad and was replaced by me. 
54000 mi

US $50
Another Ignition coil went bad. Replaced in an hour by me. 
66000 mi

US $300
My fuel pump died. Part was replaced by me. 
69000 mi Auxiliary radiator was leaking. Part replaced by me. 
81000 mi

US $50
One of my O2 sensors went bad and i replaced it myself. 
40000 mi

US $400
valve cover gasket leak 
58700 mi

US $250
fuel leak at tank coupling 
60000 mi coolant overflow bottle leaking 
62000 mi

US $50
gas filler neck seal torn- seal replaced 
64000 mi

US $150
Auxiliary radiator leak. 

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2004 Audi S4 2dr Convertible

340-horsepower 4.2L V8 6-speed shiftable automatic AWD

52700 mi

C $650
rough idle when engine warm, CEL on briefly then off, shop read engine codes, replaced battery and swapped ignition coils from one cylinder bank to the other, told to come back if problem returns. 
57640 mi

C $1356
replaced valve cover gaskets and half moon gaskets to repair oil leak DIY replacement of the coolant reservoir - there were stress fractures forming on the side of the tank. It wasn't leaking but would probably begin leaking within six months. Part cost $56.00 plus some rad fluid to replace the amount lost. 
66340 mi

C $380
front crank seal failed 
68200 mi crank seal failing again 
68200 mi

C $550
crank seal failure misdiagnosed - actual leak was from the oil filter canister connection to the block 
79120 mi

C $2522
Oil leaks from valve covers. Replaced gaskets and seals. The car still leaks oil. 
87420 mi

C $1400
Fuel pump failed. Replaced it and performed major service at the same time. The oil leak was minor and I stopped wasting time and money on this problem. The engine still dripped oil. V8 powered Audis of this era are notorious for this problem. 
32000 mi

US $1106
Replace Valve Cover Gaskets. Parts $330 and $894 for 6 hours of labor. 

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2004 Audi S4 2dr Convertible

340-horsepower 4.2L V8 6-speed manual AWD

45300 mi

US $800
engine manifold gasket leaking 
55500 mi

US $300
Also fixed leaky head gaskets. 
57700 mi

US $300
Whining noise from rear of car-fuel pump failing-fuel pump and fuel filter replaced. 
70000 mi

US $1900
Engine would not start. Engine speed sensor was replaced. 
81000 mi leaking radiator 
103000 mi

US $350
Won't crank - corroded solenoid in starter motor... 
120000 mi

US $300
Slow responding Ox sensor - rough idle/rough accel 
131700 mi

US $6300
Misfire on one bank + Cam timing advanced error. Plastic timing chain tensioners broken/worn, cam tensioners worn. Pull engine and replace all 
74000 mi Two out of eight of the ignition coils failed completely. Received a recall notice, but they failed before I could have the units replaced. 

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2004 Audi A4

Engine not specified

113000 mi Told I need a new engine because of excessive valve wear. Note: Dealer performed ALL scheduled maintenance on this car. Audi refused to particpate in the $10K cost, so I traded car for a Prius. 

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2004 Audi A4 4dr Wagon

turbocharged 170hp 1.8L I4 6-speed manual AWD

72000 mi

US $80
Snub (front) engine mount in need replacement. 
76000 mi

US $600
Crankcase oil breather hose was cracked, replaced. Coolant hose behind engine leaking, replaced. 
76000 mi

US $200
Crankcase position sensor needed replacement. 
132000 mi

US $250
Cam seals and valve cover gasket 
135000 mi

US $900
Cam seal leak, coolant flange leak at back of cyl head. 

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2004 Audi A4 4dr Wagon

turbocharged 170hp 1.8L I4 5-speed shiftable automatic AWD

107000 mi

US $750
vacuum leak 
112000 mi

US $200
lack of heat. cooling system flushed, and thermostat replaced. heat is slightly better,but is still takes a long time to warm out, and it won't get hot. mechanic believes waterpump may be faulty. 
139000 mi

US $2500
losing coolant, had cracked head. Replaced head and did timing belt replacement at same time. 
81000 mi

US $600
Replaced vacuum tubing below intake manifold 

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2004 Audi A4 4dr Wagon

220-horsepower 3.0L V6 6-speed manual AWD

153140 mi

C $2900
Car in for timing belt change, spark plugs and two broken parts that had the CEL on (about half the repair bill for regular maintenance) 

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2004 Audi A4 4dr Wagon

220-horsepower 3.0L V6 5-speed shiftable automatic AWD

32000 mi camshaft position sensor 

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2004 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 6-speed shiftable CVT FWD

91140 mi Rattle detected when engine strained (like crawl at idle) Dealer diagnose as timing tensioner and quoted exorbitant amount to repair - still looking for cheaper alternatives 
93000 mi

R 10500
Timing belt and tensioner replaced by dealer. Rattle still present when engine under strain (like crawl at idle) but dealer states "not a problem" now although before repair the same noise was "a big problem" 
125200 mi

R 8000
Noticed oil leak, upon investigation saw cracked oil sump, welded shut during AC compressor replacement 
126860 mi

R 23999
Vehicle broke down next to the road with water pouring out at the bottom. Took it to the mechanic on a tow truck. After opening the top it turned out the timing belt broke, the cam shaft broke most of its teeth off and some valves were bent A couple of days after getting the car back from the time belt replacement it started juddering and missing under all acceleration. Drove to the mechanic who diagnosed a faulty coil. Replaced 
60000 mi Problem was detected when took in for a dealer bid on car. Camshaft tensioner seals are leaking. Estimated cost $650. Not a serious issue, but car now requires the addition of 1 qrt of oil every 4,000 miles. I have since sold car to private party. 
100000 mi Bought vehicle with engine light on and air bag on. Took to dealer to get service records and found recall involving coil packs. Dealer replaced all 4 plugs no charge. Also found p0 420 got a quote for 1350 catalytic converter 
104000 mi

US $60
fuel pump noisey due to bad fuel filter. fuel pump making loud humming/whine sound 
110300 mi

US $125
EPC light and Check Engine P0102. Changed MAF Sensor and Vaccum hose replaced 
138000 mi

US $156
Changed both motor mounts and snub mount 
152300 mi

US $750
Egr valve (Combi Valve failed). Secondary air pump failed. CVT slight shudder, need oil replaced. 
29000 mi transmission control module replaced under warranty 

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2004 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 6-speed manual AWD

169260 mi

A $350
Vehicle was over revving and had erratic idle, also blew oil all over side of engine. I replaced, PCV, breather tube, vacuum hoses, thermostat, top radiator hose and balance hose. Had erratic engine idle and over revving problems, coils were replaced by dealer because of recall. Did not fix erratic idle or over revving. Had over revving and erratic idle issue when purchased. All other attempts to fix made no difference. Finally crank position sensor failed. Replaced part, erratic idle and over revving issue gone. 
127680 mi

C $4
coolant leak at back of head, was coolant temp sender O ring, read on internet a real pain to do, only took 40 minutes and cost $4.09 with tax for a new O ring and C clip 
137000 mi

C $40
4 engine codes, engine missing, poor excelleration, dont use E3 spark plugs, less than a year old, junk on turbo cars. 
151240 mi

C $300
Head gasket leaking, replaced as well as valve seals and cam seals Oil sensor replaced as gone bad Breather lines cleaned as easy to get at while apart as well as oil cooler or ring 
122000 mi

US $300
Fuel Pump needed to be replaced 
125300 mi

US $100
rear coolant flange 
126000 mi

US $100
Water pump was leaking, replaced. 
125000 mi

US $425
Fuel pump blew...towed in Sunday, replaced Monday 
132000 mi

US $1020
coolant leak/coolant temperature sender unit replaced 
152300 mi

US $500
Oil leak 
61060 mi Original factory coil packs failed and had to be replaced 
63860 mi

C $200
Replaced crankshaft sensor 
77460 mi

C $700
Coolant temperature sensor intermittently not working 
81840 mi

C $350
Replaced rusted exhaust flex pipe 
68000 mi

US $1000
Crossover pipe behind engine losing coolant. Parts were degraded to the point that they were leaking about a pint of fluid a week. Leak was the worst as the engine cooled. 
180000 mi

US $900
- Both Electrical Cooling Fans were bad. This in turn destroyed the electrical cooling fan module. 
207000 mi

US $380
- rear of the engine thermostat clip failure: replaced - radiator developing crack: replaced  - crank case breather tube broken: crappy vw plastic: replaced 
218000 mi

US $200
Crank case ventilation failed. This has thrown engine to missfire and throw map controlled coolant thermostat shorted to plus error code. Replaced crank case ventilation parts, reset ecm, all good. 
86000 mi

US $835
Rear coolant flange leaking. 
96000 mi

US $100
Coolant leak at thermostat housing. 
99300 mi

US $2000
Clutch replaced due to being worn at age. Normal. 
78300 mi

US $350
Plastic thermostat housing cracked. Difficult to duplitcate - only "seemed" to leak when cold. Driving dried the leaked coolant so it was difficult to trace. 
86000 mi

US $25
valve cover gasket was leaking 
97000 mi

US $200
Engine running lean due to vacuum leak. Split hard line on crankcase breather system at the back of the head. Replaced entire section from suction valve to block. 
105000 mi

US $45
Leaking thermostat housing. Shop replaced unit under warranty as it had been changed recently 
146000 mi

US $250
Rear coolant flange leaking 
149000 mi

US $450
No heat- heater core clogged. Flushed and thermostat housing replaced. Required return trip since initial installation was faulty. 
169500 mi

US $700
Heater core clogged beyond flush. Replaced with OEM. 
182000 mi

US $25
Lack of heat, flushed heater core, found not clogged, performed coolant flush, bled system refilled with new coolant. 
88300 mi

US $190
Replaced the Fuel pump that was dying. 
94000 mi

US $250
Replaced the Variable Cam Timing Solenoid and tensioner assembly. 
94700 mi

US $50
Replaced Oil Cooler that was leaking oil into the coolant system. 
103000 mi

US $120
Replaced radiator that had a pinhole leak. 
83000 mi

US $1700
Valve cover and camshaft gaskets were leaking and had to be replaced. 
83000 mi

US $110
MAF sensor replaced 
95000 mi

US $100
Replaced camshaft position sensor and boost control solenoid 
100000 mi

US $500
boost issue traced to broken wire to boost control solenoid 
115000 mi

US $750
coolant flange replaced 
117000 mi

US $1500
new clutch installation 
121000 mi

US $200
dead engine position sensor 
124000 mi

US $1200
leaking water pump 

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2004 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed shiftable automatic AWD

64000 mi

US $800
Fuel pumps required replacing 
94000 mi

US $800
Slight coolent system leak. Cracked resevoir. 
95000 mi

US $500
Oil leak cause coil pack failure. 
66340 mi

C $220
Replace coolant flange and temp sensor 
119660 mi

C $265
valve cover gasket was replaced 
121520 mi

C $2000
Replaced head gasket to fix a bad oil leak from the passenger side, rear corner of the engine block. Also timing belt, coolant pump as PM. 
142600 mi

C $150
The flex pipe from the exhaust down pipe ruptured and had to be replaced. 
90000 mi

US $220
No start, no CEL. fuel pump and filter changed by owner. shop quote $1200, my cost parts $220 PCV valve gave loud whine like the fan belt had failed. Got a low oil pressure light - took to shop diagnosed engine sludge build up. De-Sludged sump crankcase cover, changed PCV valve and some of the hoses. Total cost $996 Crankcase position sensor failed. Car would not start, and gave codes suggesting a problem with this (CKP). Shop quote $200. my cost from ebay $16, and 2 hours labor 
100000 mi

US $62
Engine none start, towed to garage, started next day ... garage said no compression due to flooding caused non start.... 
108000 mi

US $510
The coolant flange went again, didn't want to deal with it, as my other car was in the shop as well so had shop tow it, and do the work. 
110000 mi

US $50
Oil Dipstick tube disintegrated when I went to check the fluids, when the car wouldn't start, just like last year ... 
63500 mi

US $30
Replace failed coil. 
68000 mi

US $520
Fuel Pump Failed. 
126000 mi

US $1000
Oil dipstick tube broken ($20) Valve Gasket Cover cracked ($300) 
87000 mi

US $500
Radiator fan came loose. Cut into radiator. 
113000 mi

US $400
Auxiliary fan broke off of electrical motor. New motor and fan replaced. Coolant flange behind the block was leaking water. 
50000 mi

US $1090
needed new water pump as fluid was leaking. got new timing belt too! 
51000 mi

US $250
coolant temp thermostat replaced 
67000 mi

US $200
Fuel pump died, pump was replaced and fuel filter was replaced 
71000 mi

US $70
Leaking hoses to be replaced 
121000 mi

US $200
Flush and purge heat exchanger 
126300 mi

US $25
Harmonic balancer replaced 
133000 mi

US $50
Turbo Wastegate Actuator 
104400 mi

US $1100
bad ignition coils and fuel pump 
110000 mi

US $800
vacuum leak, check valve failures 
68000 mi

US $35
Ignition Coil on Cylinder 2 failed. Old coil was revision "R" - replaced with like item. 
69000 mi

US $170
Throttle body hose popped off. Car wouldn't run. Fouled spark plugs had to be replaced as side effect. 
73000 mi

US $650
Several minor vacuum hoses needed replaced due to crack. 
107000 mi

US $1700
Blown head gasket 
123000 mi

US $250
Turbo inlet hose split. 
62000 mi Fuel pump died. Replaced under CPO warranty 
64000 mi

US $50
Leaking bleeder screw on hard coolant pipe. Leaking cam chain tensioner/valve cover gaskets. Finally after 4th time mentioning it, do they consider it not normal and repair. 
95000 mi

US $100
bleeder check valve for the breather system and a couple of molded hoses were cracked. Caused rough running and check engine light, lean fuel codes.  
53000 mi

US $100
Coil Packs Failed 

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2004 Audi A4 4dr Sedan

220-horsepower 3.0L V6 6-speed manual AWD

52000 mi -Engine Misfire. Dealer replaced entire engine block under warrante for free. -Brake light switch error required replacement. 
74000 mi

US $450
fuel pump died 
95700 mi

US $1500
Water pump replacement with timing belt. 
112000 mi

US $650
dead fuel pump 
111000 mi

US $1500
Water pump failure although it had been replaced 30,000 miles prior. Timing belt also replaced early. 

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2004 Audi A4 4dr Sedan

220-horsepower 3.0L V6 5-speed shiftable automatic AWD

70360 mi

$300
Cylinder misfire and one coil pack was found to be faulty and then replaced 
41000 mi

US $1041
Sudden fuel pump failure 

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2004 Audi A4 2dr Convertible

turbocharged 170hp 1.8L I4 6-speed shiftable CVT FWD

48000 mi replaced water pump due to wetness on outside of pump. replaced timing belt because water pump was out. 
39000 mi

US $180
Car would appear to studder and then stall when coming to a stop occasionally, engine would not rev past 1300 when accelerator pressed, and car would not move, drive selection (PRNDS) on instrument gauge would all be highlighted at once. 
42500 mi

US $100
Ignition Coils failed, replaced under Audi Ignition coil service campaign Cam Adjuster Seals leaking 
70000 mi engine check light on highway, limp mode for one minute, slowed, then light stopped, code shows misfires but coils just replaced as part of recall. 
75500 mi

US $145
replaced transmission mount 
79000 mi

US $500
engine coolant temp. sensor 
81300 mi crankcase breather system faulty causing oil consumption 
86000 mi Scored cylinder walls, resulting in oil consumption, new factory short block under warranty as this was one of the factory covered 1.8t sludge cars. 
38000 mi

US $1900
Had to replace the transmission TCM unit on a CVT at only 37k 
48000 mi Warranty exchange on the TCM 

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2004 Audi A4 2dr Convertible

220-horsepower 3.0L V6 6-speed shiftable CVT FWD

61000 mi

US $1600
Reverse flashing gear selection indicators. Intermittent, would reset when car restarted. Diagnosed as Faulty CVT control computer. 
64500 mi

US $1800
Gear Selector lights flashing, Replace transmission computer and reprogram 

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2004 Audi A4 2dr Convertible

220-horsepower 3.0L V6 5-speed shiftable automatic AWD

99000 mi

US $320
Needed new oil pressure and oil level sensor 

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2004 Audi A4 / S4

Engine not specified

34720 mi

C $300
Computer lost settings, had to be reflashed. 

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2004 Audi A4 / S4 4-door

turbocharged 6-cylinder diesel CVT 2WD

84000 mi Glow plugs failed Drive belt about the fall off, bearings failed in belt guide and tensioner 
105000 mi

£120
reservoir bottle had split. Had to be replaced 

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2003 Audi A4

Engine not specified

43000 mi Carmax told me I had engine sludge. Audi mechanic looked at oil cap, said it was bad sludge, but after two days with my car they said it was normal. Also replaced cupholder, battery, ball joint, and flushed brake fluid. 

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2003 Audi A4 4dr Wagon

turbocharged 170hp 1.8L I4 5-speed shiftable automatic AWD

78120 mi

C $30
Coil pack failure, replaced with OEM part. 
78740 mi

C $25
Had to replace coil pack. Second one in as many months. 
86180 mi coolant temp sensor 
73000 mi

US $1437
Coolant leak; hoses and seals replaced; 80k service completed at same time 

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2003 Audi A4 4dr Wagon

turbocharged 170hp 1.8L I4 5-speed manual AWD

92000 mi

US $200
One spark plug coil failed Exhaust pipe rust hole repaired by replacing pipe 
96000 mi

US $400
Original exhaust hanger was rusted off, new one welded on 
115320 mi

C $205
Flex pipe rotted out, was replaced 
121520 mi

C $25
Cylinder 3 misfire. Coil pack replaced 
125860 mi

C $70
Diverter valve malfunctioned; replaced but caused turbo to leak coolant into the oil. Will need to be replaced at a later date. 
129620 mi

C $630
Motor mounts had failed and were leaking. Mounts replaced. 
120000 mi All 4 coil packs replaced. 
129000 mi

US $395
Rear coolant flange needed replacement. 
131000 mi

US $650
Cylinder head and valves failed, small hairline cracks on 2nd cylinder. 
71010 mi

US $260
Replace radiator Replace driver side rear diff seal Replace center diff output seal 
105500 mi

US $18
Lower coolant temp sensor failed. 
124000 mi

US $500
Turbocharger replaced. 
128000 mi

US $85
Replace all 4 ignition coils. Replace main coolant temp sensor. 
129300 mi

US $40
Replace primary O2 sensor. 
132000 mi

US $300
Replace exhaust. 
143000 mi

US $5
Replace cracked dipstick tube. Replace j plug and turbo coolant lines. 
143000 mi

US $28
Replace cam cover and intake cam seal. 
144000 mi

US $2000
Replace cam seal Replace VVT gasket Replace timing belt/water pump/tensioner Replace thermostat 

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2003 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 6-speed shiftable CVT FWD

63000 mi

US $8100
I drove off the used car lot and five miles down the road the light came on. Coolant waring light came on and overheating. Replaced the water pump and timing belt. (Then we got the car back and the head gasket was blown and that's still not fixed.) the car has a blown head gasket and a cracked head. 
64000 mi

US $756
 
80000 mi

US $600
Valve cover gasket was bad and leaking thus ruining 1 or more coilpacks 

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2003 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed shiftable automatic AWD

113700 mi

US $350
Cam shaft positioning sensor replaced 
28000 mi

US $19000
36000 miles took to dealer for leaking Valve cover gasket and they said a Motor Mount needed to be replaced also. Covered under warranty 
51000 mi

US $240
DIY change Coil Packs, One way valve and spark plugs. 
64000 mi

US $912
coolant leaking replaced a few clips, conduits and a coolant flange  
52000 mi

US $80
MIL light P0171 code. Determined that a check valve was cracked causing a vacuum/boost leak. removed and replaced and cleared MIL 
54000 mi

US $100
Car not heating up. replaced thermostat 
60000 mi

US $30
Misfire cylinder 1. Replaced coil pack 
99200 mi

C $60
Fitted third heater core to the car 
120000 mi

US $250
water pump failed and leak all antifreeze on the road. Had to keep filling with h20 to get it home. Happened close to home. Did the serpintine belt and timing belt with tensioner too. 
165000 mi

US $4750
Spark plug wires shorting out and warn out. 
178000 mi

US $30
Replacing thermostat 
201000 mi Timing belt broke 
67580 mi

C $1400
Replace camshaft tensioner gasket & valve cover. Replace secondary injection flange. 
71300 mi

C $150
Oil leak tracked to valve cover. Could have been because of the extreme cold that day (-35C). 
74400 mi

C $1300
Dealer replaced valve cover gasket. Water pump impeller blade was broken and replaced by shop. Timing belt replaced. 
56000 mi

US $8500
oil pressure light on. engine replacement necessary due to oil sludge. 
58000 mi coil pack went bad causing engine to misfire. 
75000 mi

US $35
Oil dipstick tube leaving residue inside, dripping into oil. 

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2003 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed manual FWD

61000 mi

US $500
Flange connecting evaporator to radiator....close to this anyhow. At 7 years old and 61,000 miles it will also need a new clutch soon we were told. Sounds normal for the age and mileage. 
156000 mi

US $2000
valve cover gasket cracked due to the hose providing the coolant and water breaking off got water and oil into the spark plugs 
157700 mi

US $250
Fuel pump started to make a loud whining sound during vehicle operation and caused issues when attempting to start the car. Replaced with an OEM fuel pump. 
158300 mi

US $900
Original clutch began to slip. Replaced with new, aftermarket clutch with a higher torque rating. Original motor and transmission mounts replaced. 
50000 mi Misfire when cold 
52000 mi Misfire at startup 
45000 mi ECU failure. Vehicle was still drivable, but the CEL was not able to be cleared. Replaced under warranty. 
65000 mi

US $300
Fuel pump failed, repaired myself 
67000 mi

US $220
Radiator leaking, replaced, did the repair myself 

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2003 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed manual AWD

44000 mi

US $100
valve cover gasket leak, repaired. 
50000 mi

US $200
cracked radiator seam 
62000 mi

US $60
Typical thermostat failure. replacing part takes 2-3 hours. 
62000 mi

US $300
Car unable to start, no diagnosis so far. 
63000 mi Low oil pressure light, checked oil pick up tube inside oil pan and found nothing. Cleaned oil tube and performed oil change, also cleaned oil pressure switch contact. Light did not return. 
99500 mi

US $150
Replaced mass air flow sensor 
104000 mi

US $20
Suction jet pump failed, replaced unit 
109000 mi

US $10
Replaced crank position sensor 
50000 mi

US $50
Replaced all 4 coilpacks (under warranty) 
218000 mi

US $1000
Misfiring Cylinder Ignition Coils Oil in Cylinders 
75000 mi

US $675
valve cover gasket worn, had it replaced coolant shooting out from rear of engine. Replaced Rear engine flange. 
85000 mi

US $500
fuel filter clogged, resulting in a burnt pump. Replaced fuel filter as well. 
52000 mi

US $400
replaced coolant flange at rear of engine block - leaking. 
60000 mi

US $570
replaced defective thermostat. 
90000 mi

US $1200
MIL was on. Thought problem was coil pack. Mechanic found cause of MIL to be rotten crankhouse vent hose, not coil pack. Had item replaced, slight valve cover leak noticed as well. 
117000 mi CEL came on, replaced the temperature sensor. 
116000 mi

US $600
Cracked pcv valve, and several other vaccuum valves in the engine area. 
70000 mi

US $275
Ignition Coils #1 and #2 went bad causing engine light to come on. This caused the car to shudder and was advised not to be driven and was towed to a auto shop recommended by a friend who is good at import euro cars. THERE IS A Campaign NOW. 
89900 mi

C $100
Replaced first coil pack (Failure) 
89900 mi

C $1200
Water pump replacement. 
75000 mi Sold with oil leak in engine near timing belt area. 
82000 mi

US $650
Coolant light kept coming on. Found a leak in one or two hoses going into coolant system and worn ring. Will give move details when I pick up car tomorrow. 
45000 mi

US $300
coolant leak from rear of engine 
45250 mi

US $200
coil failed 
84700 mi coil failed 
91000 mi

US $600
Plastic check valve failed causing a leak 
129000 mi

US $600
Oil pressure light came on, pickup tube in oil pan was clogged, replace tube. Also replaced engine mount. 

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2003 Audi A4 4dr Sedan

220-horsepower 3.0L V6 6-speed manual AWD

135000 mi

US $120
Coil pack replacement 
147000 mi

US $110
Replaced noisy accessory belt tensioner. Replaced belt while I was in there. Noise is gone. 
153000 mi

US $35
It was just a cracked expansion tank that was replaced.  
157000 mi

US $200
Pre Cat O2 sensor on passengers side had short. Replaced both sensors on B1 Replaced coolant temp sensor to clear random misfires only noticeable with diagnostic monitor. This was a long term problem that was fixed by random maintenance. 
165000 mi

US $110
Replaced pre and post O2 sensors on Bank2.  Replaced check valve and broken vac line as well. 
90000 mi

US $50
Coolant temp sensor intermittent failure. coolant expansion tank replaced because it was leaking. 
121000 mi

US $700
replaced catalytic coverter 
70899 mi

US $1351
Replace all coil packs, evap system purge valve Replace front brake pads and rotors Replace driver window switch module 
132000 mi

US $510
Change OEM silencer (Middle mufflers) 
147700 mi

US $1500
Changing the cam seal of the right blank 
88000 mi

US $2500
Pcv valve froze. Blew out seals. oil leaks everywhere.new pcv valve timing belt and seals. 
75000 mi Oil pressure sending switch. 
126700 mi

US $1500
Freeze Plug on the waterpump began to leak. Waterpump was still good, with only 40K miles on the pump. Water pump had to be replaced to stop the leak. $1500 repair b/c behind the timing cover. 
142000 mi

US $500
coolant leak 

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2003 Audi A4 4dr Sedan

220-horsepower 3.0L V6 5-speed shiftable automatic AWD

50500 mi

US $190
The gas pedal position sensor malfunctioned, causing the car to accelerate out of control. I needed to put the car in neutral in order to get it stopped! The part failed just 500 miles after the warranty ran out. The total repair cost was $190. 
71000 mi

US $1200
timing belt and steering pump 
66000 mi

US $350
Exhaust system was making a loud noise. Took it to local mechanic who recommended a Meineke shop who would weld in a new piece. both sides of the car had to be done. 
53465 mi

US $800
replace two oxygen sensors 
54547 mi

US $250
replace two crankcase breather tubes that had cracked 
108000 mi

US $250
Yellow oil sensor display on instrument cluster. Replaced oil pressure sensor. 
106000 mi Ignition Coils replaced under warranty. 
111500 mi

US $200
I have the 3.0 V-6. Ignition coils were replaced Dec 2010 with new, improved design under recall. One of the new ignition coils briefly failed (set code). Replaced it. 
126000 mi Ck engine light on intermittently. Code diagnosis indicates one catalytic converter needs to be replaced. Discussed with several mechanics and decided not to replace. No drivability issues and likely will not impact operation for a long time if ever. 
134700 mi

US $1150
Replaced water pump 
140500 mi

US $170
Replaced faulty crank position sensor 
146000 mi

US $200
Replaced one faulty ignition coil. 
150700 mi

US $700
Engine cooling module replaced. Fault prevented the electrically driven engine cooling fan from turning on. 
99200 mi

C $412
Front crankcase oil seal popped out of housing, massive oil leak. 
62000 mi

US $2800
CAT converter 
68000 mi

US $1200
Fuel pump ... died in the fast lane 

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2003 Audi A4 2dr Convertible

turbocharged 170hp 1.8L I4 6-speed shiftable CVT FWD

49000 mi

US $900
Leaky gasket 
77000 mi

US $25
Replace temp sensor because readout was intermittent 

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2003 Audi A4 2dr Convertible

220-horsepower 3.0L V6 6-speed shiftable CVT FWD

49000 mi

US $1700
Check engine light on. Car 'spluttering' at idle. New Cam Shaft seals identified as problem area. 
44000 mi

US $14500
Replace the coil packs, oil change, and replace 4 tires. 
83300 mi

US $202
Coil #2 replaced 

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2003 Audi A4 / S4

Engine not specified

138880 mi

$1700
camshafts got broken (2.5tdi) with automatic gearbox, that was weird 
62000 mi

US $1200
Timing belt replaced due to water pump leakage, and valve seal replaced due to oil leakage. 

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2003 Audi A4 / S4 4-door

turbocharged 4-cylinder diesel manual AWD

280240 mi

€300
Intercooler had a crack, needed to be replaced. 

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2003 Audi A4 / S4 / RS4

turbocharged 4-cylinder diesel manual 2WD

138880 mi

€275
Tensioner pulley which tensions auxillary belt for power steering, compressor and alternator went faulty. Front bumper and radiator had to be removed to get at the tensioner! 

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2002.5 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed shiftable automatic AWD

100000 mi

US $500
Upon last trip to Audi told me I had oil leaking from the valve cover gasket. recommended also to change the cam seals. They wanted 700 to replace at dealer. Took elsewhere had motor mounts also changed and valve cover for 500.00  
102000 mi

US $200
check engine light illuminated. Took to dealer and was told was vacuum leak( which explains rough idle i've had for a year). Repaired 4ft of hose and air jet. Repair did not fix rough idle. Am returning to shop next week. 
111000 mi Rough idle still present. Audi wanted to replace everything vacuum related for rough idle and do a intake manifold cleaning...declined...then sold to my father 
55490 mi

C $100
Check engine light flashing, ignition coil #4 replaced 
64480 mi

C $450
Rear coolant had been leaking for some time and as a result, no heat was coming into the cabin. Coolant was also due for a flush.  During repair, located 2-3 more gaskets on the engine which also needed replacing. Cheap parts but expensive labour. 

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2002 Audi A4

turbocharged 4-cylinder manual AWD

105400 mi

€580
Water pump failure. These are made of plastic that is not bound to last. A very common problem with this engine. 

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2002 Audi A4

Engine not specified

70000 mi

US $150
Oil leaking from engine found by the technician. Gasket replaced. 
70000 mi

US $1600
oil leak from camshaft seal 
79000 mi

US $1500
left and right Engine mount support leaks/replaced 
105000 mi

US $900
Water Pump leak, replaced water pump leak. 

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2002 Audi A4 4dr Wagon

turbocharged 250hp 2.7L V6 6-speed manual AWD

95700 mi

US $2000
Head gasket failure 
97000 mi

US $1750
Rear main oil seal leak 

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2002 Audi A4 4dr Wagon

turbocharged 250hp 2.7L V6 5-speed shiftable automatic AWD

186700 mi

US $300
POS sensor was bad 
99000 mi

US $950
Replaced - breather hose, crankcase vent valve, valley pan gasket, etc. Oil change. 

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2002 Audi A4 4dr Wagon

turbocharged 170hp 1.8L I4 5-speed shiftable automatic AWD

92000 mi

US $60
Coil pack failure, created a very bad miss and could only be driven short distances.  
98000 mi

US $30
Replaced leaking rear coolant flange 
100000 mi pcv return hose needed replacing when sold 
162300 mi

US $1600
Head gasket blew oil in coolant 

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2002 Audi A4 4dr Wagon

turbocharged 170hp 1.8L I4 5-speed manual AWD

85000 mi

US $400
Rear coolant flange cracked. 
37000 mi Car would not start. Would not turn over. Repair shop could not duplicate problem. 
72000 mi

US $400
Running poorly and making noises. Timing belt was about to go and was repllaced before any damage was done. Also, regular maintenance was done. 
92680 mi

C $950
Replaced Head for valve issue. 

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2002 Audi A4 4dr Wagon

220-horsepower 3.0L V6 6-speed manual AWD

141000 mi

US $575
Serpentine belt and tensioner pulley 
143000 mi

US $250
Coolant overflow tank often low. Tests cannot find any leaks. 
145000 mi Never went further to fix coolant leak, probably a sensor/seal. Same with oil leaking around I believe was spark plug seals? Fuel pump died, traded car. 
101900 mi

US $695
replaced radiator due to leak 
105000 mi check engine light - code indicated cat converter/sensors but no obviously problem found. Reset. 

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2002 Audi A4 4dr Wagon

220-horsepower 3.0L V6 5-speed shiftable automatic AWD

71000 mi

US $100
Catalytic converter tripped CEL. Mechanic did not road test after reset because of icy road conditions, but CEL has not come back on. 
107000 mi

US $1100
Odd noise. Turned out to be some belts that needed replacing. 

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2002 Audi A4 4dr Sedan

turbocharged 250hp 2.7L V6 6-speed manual AWD

61000 mi

US $200
Leaking coolant after-run or auxiliary pump. Pump located in the "V" of engine beneath the intake manifold. Also required replacement of intake manifold gaskets as this is mandatory with R&R of intake manifold. 
67000 mi

US $40
CEL came on - system too lean & audible vacuum leak. Crack/leak in 4-way vac connector & non-return valve 078 611 933B. Temporary fix using RTV silicone made. Purchased part and replaced w/some vac lines. Car fully repaired in 4 hrs total repair time. 
73000 mi

US $40
Non-return valve in emissions system cracked causing a vacuum leak and a lean condition which triggered the CEL. Installed new valve (part is a dealer only item). 
78000 mi

US $40
Coolant Temperature sensor failed - initially erratic and then total failure of temperature gauge response. Replaced sensor with improved design (VW/Audi part) and gauge now works properly. This sensor outputs to both dash gauge and ECU. 
84000 mi

US $415
Oil leak coming from recess on front of engine where crank lock pin is inserted during TB change. Plug and o-ring replaced. May not be only oil leak, but it was a major one. 
90000 mi

US $2400
Water pump bearing failed; noise indicated problem was possibly severe so car towed to prevent more damage. Timing belt,water pump, tensioners and idlers/rollers were all replaced. This was only 20k miles since same service was last done. 
53300 mi Timing belt plus water pump, upgraded diverter valve, replaced gaskets (leaking minimally). 

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2002 Audi A4 4dr Sedan

turbocharged 250hp 2.7L V6 5-speed shiftable automatic AWD

108000 mi

US $850
Oil cooler was leaking into cooling system. 
127000 mi

US $1503
Heater Core went bad. Needed to be replaced. Very labor intensive. 
137000 mi

US $1115
I ordered the auxiliary cooling fan online and did that myself. (I now know how to put the S4 into 'service position' sheesh, so much work just to be able to get at the fan. The fan was $150. (Audi wanted $700 installed). I also ordered a used Throttle Body online for $250 and installed that. It was throwing a fault code and I have to make it qualified to pass for the bi-annual emissions test that is due. (Can you believe Audi wanted $1100 for the Throttle Body-part only.) New spark plugs. Oxygen sensor. 
139000 mi

US $450
Engine coolant temp sensor failure was causing ECM to think that even when engine was cold, it was at operating temp. This made vehicle very difficult to start and keep running, since it was not receiving an enriched air-fuel mix. 
146000 mi

US $402
No heat. Had to have heater core flushed. 
112000 mi

US $500
o2 sensor went bad. Replaced all 3 to avoid going back at later time. 

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2002 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 6-speed shiftable CVT FWD

41000 mi

US $800
Leaky gasket caused oil to collect around spark plugs and coil packs. 
55000 mi

US $55
thermostat 
58000 mi

US $40
coil pack replaced 
74250 mi

US $40
coil pack replaced 
96500 mi

US $440
CEL required a vacuum line replaced. Replaced plastic coolant flange on back of head. Did work myself. 
117000 mi

US $60
slight miss at low revs and low loads only. Thought it was bad fuel, but replaced plugs, air filter, one coil pack, Techron and alcohol to absorb moisture. Went away for a while, now is back when I filled up the tank with Shell Premium 
139000 mi Replace faulty coil pack and spark plugs fouled by the coil pack 
153000 mi

US $700
Replace leaking radiator. Replace rear water flange on back of head (insurance measure). Replace heater core for lack of heat. Replace Turbo. Noticed oil in intercooler ducting. Also, the waste gate nut was gone, causing low boost with an open waste gate. Replace timing belt service. Water pump as precaution. Replace complete PCV system due to deteriorated hoses 
154000 mi

US $400
Replace broken fuel pump. 

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2002 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed shiftable automatic AWD

92300 mi

US $200
leaking valve cover gasket shorted an ignition coil 
95000 mi

US $300
Leaking vacuum hoses-repaired hoses 
105400 mi

US $280
vacuum leak 
45500 mi

US $40
Valve cover gasket replacement. Oil leaking from numerous spots due to bad gasket. Part purchased from Audi Dealer. 
46000 mi

US $350
Had to replace a broken water pump. Changed the timing belt and thermostat while I was in there. Did all work myself and paid ~350 for a kit online. 
51000 mi

US $50
Coilpack went bad. 
70000 mi

US $660
Check engine code P1296. Replaced coolant temp sensor near firewall. Thermostat replaced. 
163000 mi Timing belt and head gasket 
78000 mi

US $330
Oxygen sensor failed 
87300 mi

US $250
2nd trip this week. The shop misdiagnosed or missed an additional problem - the crankshaft position sensor. New sensor required. No further problems after this.  
97000 mi

US $300
Thermostat was stuck open after a coolant flush. Replaced the thermostat 
113000 mi CEL illuminated for over 2 months - the MAF sensor requires cleaning. 
113000 mi Loss of coolant led to low-coolant light warning. Re-filled with 2qts, as the reservoir was empty. Last coolant fill was 2 yrs ago so a slow leak or evaporation 
113500 mi

US $60
MAF sensor was replaced to potentially fix the CEL. 
117000 mi

US $210
Exhaust pipe was correded and rusted at the flex pipe causing bad fuel efficiency and a lot of noise. new flex was cut and welded in 
118300 mi

US $20
replaced a vacuum line and a pcv check-valve valve cover gasket and half-moon seals were replaced. unable to replace half-moon seals and i may have done a crappy job on the VCG 
335000 mi

US $150
Coolant flange was leaking. 
56000 mi

US $100
new DV, old one's diaphragm worn out and was losing power. 
74000 mi

US $1000
new turbo, diy in the front yard, replaced with a k04. 
50000 mi

US $1000
Leaking gasket seal caused a buring oil smell. Gasket was replaced. 
73000 mi

US $50
Leaking valve cover on engine. 
97000 mi

US $1800
engine mounts replaced water pump causing coolant leak.. replaced waterpump and re-did timing belt service 
113000 mi

US $200
Catalytic converter replaced. 
145000 mi

US $650
Leak at turbo 
87000 mi

US $725
Radiator had pinhole leak 
74400 mi

C $130
Coilpack on cylinder #1 failed. Normal driving, engine near idle but starting to accelerate. Engine was warm and operating normally. No warning. CEL flashed fast, vehicle lost a lot of power and started shaking. Towed to dealer, diagnosed, replaced. 
81220 mi

C $200
Valve cover & Camshaft Adjuster seal leaks. Both seals replaced.  

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2002 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed manual FWD

135160 mi Rocker cover gasket. Cause was difficult to determine, either failure of the gasket or incorrect installation. 
19600 mi All ignition coils. 
53000 mi

US $106
Engine coolant sensor + Vacuum hose. 
75000 mi

US $150
Thermostat. 
81000 mi

US $225
Coolant flange leak. 
84000 mi

US $220
Valve cover gasket was replaced. 

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2002 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed manual AWD

60000 mi

US $90
Replace leaky lower coolant hose. 
62000 mi

US $50
COIL PACK FAILURE. CAR FLATBEDDED TO DEALER 
70000 mi

US $50
ANOTHER COIL PACK FAILURE 
77000 mi

US $2000
car stalled while merging on the highway. would not restart. coasted to shoulder. flatbedded to service. car sold upon completion of repair. Car was fun to drive but not dependable. 
88000 mi

US $450
all 4 cyl coils replaced 
87000 mi

US $200
Oil dip stick/tube broken and replaced. 
99000 mi

US $1100
Oil pump stopped working, engine was prone to overheat and cause irreparable damage soon. Replaced Oil Pump, oil pressure sender, and the like. Check engine light came on the night before I brought it to the mechanic, left car immediately. 
102000 mi

US $90
Ignition coil misfire, 3rd coil replacements. Replaced myself in the driveway after ordering newest series of coils. 
121000 mi

US $1800
radiator 
192000 mi

US $6000
Oxygen sensors and breather system replaced. Engine complains of running lean at times but problem is intermittent. Issue would show up when low in gas at higher cruise speeds, then go away after some time. Passenger side engine mount was leaking hydraulic fluid badly. Replaced both left & right engine mounts and also front snub mount. 
197000 mi

US $2500
MAF Sensor replaced 
206000 mi

US $3000
Flex Joint damaged and required repair.  
80000 mi

US $152
Replace Broken Vacuum Line 
90000 mi

US $300
Replace Coolant Temp Sensor, Replace Driver Side Wiper Arm 
85000 mi

US $6000
Engine sludge caused lack of oil pressure which then caused a spun rod bearing which destroyed the internal engine parts. 
107000 mi

US $40
Failed ignition coil. AAA paid for the tow home (wasn't sure how to factor in that potential cost). 
120000 mi

US $110
MAF sensor failed, bought new one and replaced myself 
121500 mi

US $8
Found a couple of vacuum leaks in the turbo system. 
131000 mi

US $40
A suction pump (vacuum switch) in the PCV system failed and required replacement. 
150000 mi

US $210
The coolant return fitting out of the turbo failed. Quick easy fix. Oil supply line to the turbo was leaking. In retrospect this might have just been a loose fitting, but I replaced the fitting and the line to be safe and avoid fixing something twice. 
156000 mi

US $100
a mysterious coolant leak that was not able to be replicated. Maybe extreme cold weather related? Problem has not returned since. 
157000 mi

US $500
Water pump leaking, probably the o-ring, replaced entire assembly and timing belt. Then 2 weeks later my thermostat housing exploded. 
168000 mi

US $50
Failed coilpack. Diagnosed with personal pc and had a spare coil in my trunk. 
170000 mi

US $200
another failed coilpack, so I just replaced all 4 
77500 mi

C $200
Misfire when cold, replaced MAF, coolant temperature sensor on recommendation from my mechanic 
101000 mi

US $150
Coil pack failure on cylinder #1. Replaced all 4 coil packs due to the large difference in the revision of the part. Had version L replaced with version R 
106000 mi

US $100
Small leak in Evap system. The gas tank has a crack or defect on the top of the tank. Purchased a used tank. Awaiting time to install. 
121000 mi

US $900
Gas tank had a failure point. causing evap system error. New tank corrected problem. 
125000 mi P0420 catalytic efficiency. Purchased new front O2n sensor. Awaiting install. 
127000 mi

US $88
Replaced front O2 sensor 
129019 mi

US $380
Crank positioning sensor needed replacing 
131000 mi

US $130
2 coil packs failed. Replaced all 4 due to new revision of part. 
137000 mi

US $400
Motor mount failed. Liquid inside mount oozed out. Both motor mounts replaced with solid rubber design. 
141000 mi

US $395
Cat inefficient error - clogged Cat. Replaced cat. Dipstick funnel failed. 
143000 mi

US $100
Replacement of suction pump, bleeder valve and pressure control valve. 
144000 mi

US $100
Rear O2 sensor replaced. Code for faulty heating element 
150000 mi

US $800
Oil pan seal was leaking 
92000 mi

US $94
Coil pack D failed causing misfire. Replaced Coil pack. 
99300 mi

US $30
engine speed sensor /engine crank position sensor failed, and was replaced 
110000 mi

US $500
Car began blowing a lot of white smoke out of exhaust. Problem was either Head gasket or Oil Cooler. Both were replaced. 
114000 mi

US $55
crankshaft position sensor (aka vehicle speed sensor) intermittently not working on cold starts, requiring repeated cranks to start the car 
121000 mi

US $20
Rear coolant flange leaking, replaced with new flange and O-ring. 
133000 mi

US $12
cam chain tensioner gasket leaking. gasket was removed and replaced. 
149000 mi

US $100
Water pump failure - impeller separated from shaft, resulting in lack of coolant circulation 
182000 mi

US $350
clutch disc worn, replaced 
185000 mi

US $50
Cam position sensor started throwing codes occassionally, was replaced. 
192000 mi

US $250
leak in radiator, replaced; thermostat sticking open, replaced 
195000 mi replaced rear differential mount 
197700 mi

US $500
head gasket leaking. Valve job done on head (seals replaced, etc), all gaskets etc replaced 
209000 mi thermostat sticking open 
223300 mi

US $1500
FOD (foreign object debris) ingested into engine, damaging head and piston #1. Possibly some slag broke off a weld inside the intercooler? 
4300 mi Ignition coil failed, car in the shop for 2 weeks due to out of stock on ignition coiils. 
125000 mi

US $325
Ignition coil failed. New set needed. 
135000 mi

US $7200
Intake valve head broke. Damaged cylinder 1,2 and 4 beyond repair. New block and head needed. Replaced clutch during vist since engine was being replaced and access was easy. 
126000 mi

US $8500
Intake valve head broke and debris damaged cylinders 1,2 and 3 beyond repair due to migration through the intake manifold since the head on the valve was broken and open during power stroke. Estimated $8500 to repair, so junked. 
123380 mi

C $50
Coolant leak on heater hose flange on back of engine block. Replaced plastic flange and o ring. 
138260 mi

C $50
coolant plug leaking on engine 
153760 mi

C $35
Vacuum hose split. replaced with new hose. 
163060 mi

C $80
Bad engine crank position sensor 
95000 mi Check engine light code indicated a problem with the thermostat or sending unit. Code reset and will see if problem re-occurs. 
96000 mi Check engine comes on. Code indicates a problem with either the thermostat or sending unit. Light goes off on its own after a week or so. Shop couldn't pin down exact cause. 
106000 mi

US $210
Engine temp sensor failed. Car difficult to start when engine was cold because sensor was telling computer that the engine was at 80 degress instead of 40 or so. 
111000 mi

US $850
Car would lose power. Could only go about 15 MPH. I replaced the throttle body. The problem took a couple days to diagnoise. 
69000 mi

US $50
rough idle due to the front O2 sensor. 
69000 mi

US $367
intermitant rough idle. dealer replaced the MAF under warantee but the problem still exist. they cleaned the throttle at cost to me. replaced the skeleton for the lumbar in the driver's seat. 
73000 mi

US $260
-O2 sensor once again. -spark plugs for some strange reason were red at the tips. -rough idle 
139000 mi

US $300
Replaced the wires leading to the coils. The insulation was cracked and they were shorting out on each other. I bought the car this way. I replaced the plugs and coils, too. 
141700 mi

US $300
Check engine light on. Code for large leak evap. Replaced purge valve and a hose leading through the firewall. Check engine light on. Code for bad cat. Assumed to be from previous owner driving so long with 2 cylinders misfiring. I bought it misfiring and fixed the wiress leading to coils. Cat is bad but runs fine. Have to live with this code. 
148000 mi

US $280
Oil leaking onto the exhaust and burning off causing a bad odor. Replaced valve cover gasket and cam chain tensioner seal. 
151300 mi

US $275
Bad vibration at idle and the intake system sounds different. not quite as peppy, I found vacuum leaks and replaced the diverter valve and PVC valve. Better but still vibrates. Shop checked all systems...perhaps the flywheel but not sure 
152000 mi

US $199
Flex pipe broke off. Had a cheap one welded in 
94000 mi

US $200
Bad combi-valve throwing a check engine light. Replaced valve and fixed problem. 
136800 mi

US $400
Vacuum hose connections leaky causing failed emissions testing. One hose broken. Replaced all connectors with screw-type. 
77000 mi

US $2
Check engine light came on. I pulled the code, running lean, cylinder bank 1. Found vacuum hose broken causing leak. Replaced vacuum hose. Cleared code. 
89000 mi

US $50
Speedometer stopped working. Check engine light came on. Replaced vehicle speed sensor. 
90000 mi

US $1100
Exhaust pipe cracked between resonator and muffler. Pipe needed to be replaced, as the area of crack was too thin to weld. Replaced entire exhaust system instead. 
91000 mi

US $100
Engine misfiring. One coil pack died. Elected to replace all 4, as the coil packs are a known issue, and they were only $25 each. 
94000 mi

US $45
Check engine light came on, pulled code, consulted manual and replaced Engine Coolant Temperature Sensor. 
102000 mi

US $80
Car started misfiring. Intermittant issue over about 100 miles. Finally the coil pack died and set a code. I replaced 3 coil packs with OEM replacements. Had to order the 4th. Aftermarket coil pack lasted 12,000 miles, so I will replace all 
112000 mi

US $1
Vacuum leak found, fixed with tape but need to replace more rubber hoses. Vacuum leak causes A/C to work poorly, fools computer to think engine is under hard load. 

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2002 Audi A4 4dr Sedan

220-horsepower 3.0L V6 6-speed shiftable CVT FWD

138000 mi internal coolant leak diagnosis in March, sold in July 
105000 mi

US $550
Overhead gasket seal was old and leaking. Caused engine to misfire. 
114000 mi

US $450
Car running rough fan running a lot. Drove it with check engine light (CEL) for a month~ code was for a temp sensor. Next, car vibrated and CEL began to flash. towed to shop. replaced temp sensor, hoses, and one coil pack. Fixed 
20500 mi coolant leak. Replaced valve 
46631 mi replaced catalytic converter 
78500 mi

US $1050
Replaced faulty Combu Valve 
79000 mi Replaced catalytic converter 
67000 mi

US $2150
Water pump failed. Engine ran hot and was shut off before permanent damage could occur. Car was towed to a local shop, but they were not equipped for the repair. They towed the car to the Dealership. Dealership replaced the water pump and timing belt. Check engine light was on for two weeks. Local auto parts store reset the light, it came back on after 3 days. While in the shop for problem 1, shop said they think problem 1 caused problem 2. They reset light but repaired nothing. Had to take car bac Check engine light on (as mentioned in problem 2 of trip 1). Light reset during trip 1. Light came on 3 days later. Went back, sensors bad, replaced sensors, problem solved. 2 weeks later light has not come back on. 
107300 mi Coil failed, car was undriveable. Towed to dealer, they notified me that a recall had just gone out on the coil and replaced it for free. Happy me :) 
126700 mi

US $80
Thermostat completely failed in the open position. Car drove fine but would take 20+ minutes to warm up. Did not notice the problem until the weather got ready cold. 
142000 mi

US $1270
Engine stalled, would not maintain idle without foot on throttle. Multiple codes, 2 O2 sensors intermittently giving trouble for years could be causing them. 3 sensors replaced at my request (due to reduced labor cost of the 3rd sensor). Same problem a week later, engine stall. Shop said ETC sensor giving readings that "didn't make sense" and suggested it be replaced. I requested shop replace the ETC sensor and fuel filter (it was overdue anyway). 
143000 mi

US $630
Same prob another week later, engine stall. Shop gave an OBDII recorder to get more info. MAF sensor throwing bad data, shop advised replace sensor and wiring. Engine ran smoother when it was disconnected. Sensor and wiring replaced. Same problem as before. Advised shop that no routine maintenance had been performed since about 80k miles, other than oil and tires. Shop checked regular maintenance items, found two bad spark plugs and 4 poor plugs. Replaced plugs. 
146300 mi Stalling again, but this time could find nothing wrong and problem is gone again. 
180000 mi MIL thrown for both cat banks. Did a $150 fuel system service and cleared codes. Ran fine for a few weeks, then codes came back. 

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2002 Audi A4 4dr Sedan

220-horsepower 3.0L V6 6-speed manual AWD

75000 mi CEL was constantly illuminated but the drivability of the car was normal. Repair was done by mechanic free of charge due to previous error during a pre-purchase inspection. Cost of parts/labor was $1000+. Cause: secondary air injector. 
86000 mi

US $220
I had a faulty oil level/temp sensor replaced. 
153000 mi

US $1000
Water pump, timing belt, pulleys, tensioners, oil seals on pas. side cam adjuster, coolant O ring on temp sender, oil, oil filter, air filter, spark plugs, drive side motor mount (all replaced this year). 
165700 mi

US $70
coolant leak from connection between flange and hose going to heater core. 
180000 mi

US $200
replace leaking vacuum hoses, PCV valve and fuel pressure regulator. 
65000 mi

US $200
Engine water temp sensor was replaced. 
68000 mi

US $300
2 of 6 ignition coils bad. Shop recommended replacing all 6, which was done. 2nd time since car was new that this had to be done. Hose came off of emission control fan, causing high pitched turbo-like whine for up to 30 seconds, intermittently and mostly on engine cold start. Mechanic discovered and reattached hose at no charge while diagnosing problem #1 
75000 mi Catalytic Converter replaced under emissions warranty. 
87000 mi

US $550
Oil Leak from Right Valve Head Cover; replaced L&R Valve Head Covers. Replaced serpentine belt & tensioner. 
90000 mi

US $175
Car would crank at start but not fully turnover; mechanic unable to Dx problem; however, works fine now. 
91000 mi Replacement of coolant sensor; caused CEL and engine fan to power on during cold starts; also responsible for controlling fuel mixture entering the cylinders. 
128000 mi

US $800
Replaced all 4 oxygen sensor; sensors had been running sub-standard performance for > 1 year. Replaced OEM sensors x 4 with after-market sensors. Issue diagnosed via owner's VAG-COM. 
95000 mi

US $1800
Replace timing belt Repair broken glove box 
118000 mi

US $700
EPC and traction control light came on randomly causing intermittent loss of power, and hesitation. 
121000 mi

US $974
throttle body sensor replaced Also had routine 120k svc 
183000 mi

US $400
coil pack replacement - one bad but all 6 replaced 
69000 mi

US $800
The A4's ignition coils crapped out AGAIN plus spark plugs, vacuum lines, throttle plate cleaning and lots of other labor charges to replace coils & plugs. 
79000 mi

US $1400
Brakes, ignition coils (again), minor bodywork 
90000 mi ignition coils went again within 1 month of new ones installed; I sold the car the day I picked it up from the shop 
135000 mi

US $150
Oil pressure light would come on intermittently. Replaced the sending unit and oil filter. 
82460 mi Engine started missing badly, then Check engine light started flashing. Diagnosed as failed ignition coil. Dealer replaced all 6 ignition coils per Audi Canada Voluntary Emissions Service Action 28F2/J1 Ignition Coil Inspection/Replacement. 

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2002 Audi A4 4dr Sedan

220-horsepower 3.0L V6 5-speed shiftable automatic AWD

136700 mi

US $600
Replaced all engine mounts. 
110000 mi

US $20
replaced ignition coil 
44000 mi

US $150
Coil pack on one cylinder. Will probably replace the rest myself as they are a problem for many Audi 3.0 owners. 
50000 mi

US $2000
Trans computer replaced along with tiptronic switch circuit board 
59000 mi

US $50
Coolant temp sensor 
65000 mi leaking cam seals, collapsed valve tappet 
59000 mi

US $1635
Software update: $135 Long overdue, apparently misfires were occurring that caused supplemental check engine codes along with the cat replacement.  Intake manifold: $1500. Repairs done due to a plastic rattle sound from intake manifold changeover mechanism that rattled in its seat during med-hard acceleration until intake changeover at 4200rpms. Cat replacement: covered under extended emissions warranty 8yr/80K but costs was quoted at about $1200 Caused by intermittent check engine light for a bank 2 O2 sensor code . 
202000 mi

US $76
Fuel pump failed and was replaced 
59000 mi

US $1000
timing belt. Belt had to be replaced because it was giving us trouble, this was unusual according to the dealer...belt looked to have been run very hot for extended periods of time, possibly an LA car or other metro location? 
76000 mi

US $22
OEM ignition coilpack failed on cylinder #4. Drove to dealer adn all 6 were replaced under pending recall. 
83000 mi

US $50
Changed out oil level sensor to alleviate "Bad Oil Level Sensor" message on car's diagnostic display. 
94000 mi

US $5500
Catalytic Converters (L & R) 
130000 mi

US $162
Temperature sensor failure caused fan to run at high speed at cold start. Part was replaced. 
130000 mi

US $464
Drive belt tensioner failed. Belt tensioner, multi rib belt and expansion tank cap replaced. 
134000 mi

US $1157
Water pump bearing starting to fail. Water pump and timing belt replaced. 
148000 mi

US $1800
Catalytic converter fault 
151000 mi

US $4200
Catalytic converter Bank 1 (Feb was bank 2) 
164000 mi

US $900
fuel pump failure 
174000 mi Malfunction Indicator Light was intermittently flashing near 170000 miles. Usually occurred when coasting on flat or downhill at highway speeds. Issue disappeared before mechanic could check. 
185000 mi

US $2600
intake manifold gasket and associated tubing replaced. (engine did not turn) rnwater temp sender and o-ring and spark plugs 
195000 mi

US $600
Motor Mount (Front/Snub) crack. 
197000 mi

US $300
A MASSIVE oil leak. Needed a special gasket that goes behind the motor fixed. 
75000 mi

US $2800
Had to replace one of the overhead cams which the dealer said was a common repair for this car 

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2002 Audi A4 4-door

turbocharged 6-cylinder automatic AWD

41000 mi

US $50
It took 3 trips to accurately diagnose the problem as a pinhole in the cylinder head. The repair was JB Weld and is currently holding although I don't feel that it was appropriate. I think the head should have been replaced. 

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2002 Audi A4 4-door

turbocharged 4-cylinder diesel manual 2WD

116560 mi

R 2600
water temp sensor faulty 

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2002 Audi A4 4-door

turbocharged 4-cylinder manual AWD

53000 mi

US $600
breather hose from the intake manifold to suction pump/breather valve cracked 

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2002 Audi A4 4-door

turbocharged 4-cylinder manual 2WD

64000 mi

US $50
Coolant flange replaced. 

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2002 Audi A4 4-door

turbocharged 4-cylinder automatic AWD

72000 mi

US $500
Coolant leak. 
54000 mi Coolant Sensor Malfunction 

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2002 Audi A4 4-door

4-cylinder automatic AWD

60000 mi

US $1900
Water pump was leaking and needed to be replaced; replaced the timing chain also b/c it's recommended to be changed at 90K miles & have to change the water pump at that change also -- planning on keeping the vehicle, so it was prudent 

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2002 Audi A4 / S4

Engine not specified

164300 mi

€50
Fuel nozzle rubbers was replaced. 

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2002 Audi A4 / S4 / RS4 4-door

4-cylinder manual 2WD

119040 mi

R 3000
Oil leak - found pcv pipes cracked. replace all. 
120900 mi

R 7300
Hose connector at the back of the cylinder head replaced 
137020 mi

R 350
Metal pipe corroded. Replaced temp sender unit 

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2001.5 Audi A4 4dr Wagon

turbocharged 250hp 2.7L V6 6-speed manual AWD

176000 mi

US $900
Driver's side exhaust cam, and exhaust lifters had to be replaced, along with the cam adjuster. It appears that the 1 lifter failed. 
181700 mi

US $45
Crank position sensor was replaced. 
38000 mi

US $50
Valve cover gasket was bad, causing leak to occur. 
41000 mi

US $80
Fuel gauge sender unit went bad 
44000 mi Broken vacuum hose 
46000 mi

US $600
Camshaft tensioner seal leaking oil. Replaced seal. 
46000 mi

US $300
Exhaust Gas Temperature Sensor. 
51000 mi

US $700
Bad temperature sending unit. 
59000 mi

US $600
Replaced auxillary water pump (sometimes called after run cooling pump) Cracked coolant tank replaced 
60000 mi

US $300
Replaced whining fuel pump 
69000 mi

US $25
Coolant temperature sensor bad. Replaced temperature sensor. Exhibited bad starting as source of problem. 
83000 mi

US $960
Replaced vacuum hose assembly Replaced valve cover gasket 
84000 mi

US $650
Heater core required flushing 
86000 mi

US $1200
Leaking coolant hoses Leaking camshaft seal 

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2001.5 Audi A4 4dr Sedan

turbocharged 250hp 2.7L V6 6-speed manual AWD

81220 mi

C $50
Repair Coolant Leak 
37200 mi

C $259
Aux Coolant pump failed. 
38840 mi Coolant expansion tank developed leak. 
123000 mi

US $900
Turbos sealed and turbo vacuums replaced.  
111000 mi I could smell burning oil when the heat or ac was on. One of the valve cover seal and camshaft seals were shot leaking oil. 2.7T 
148700 mi Blown passenger side turbo had big turbo kit installed. 

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2001.5 Audi A4 4dr Sedan

turbocharged 250hp 2.7L V6 5-speed shiftable automatic AWD

113460 mi

C $130
Replaced both front oxygen sensors and one ignition coil. All other ignition coils will require changing in the near future 
124620 mi

C $230
leaking aux. water pump. Replaced with new replaced exhaust clamp as old one rusted. 
129140 mi diverter valves changed 

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2001.5 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed shiftable automatic AWD

117180 mi

C $150
Replace malfunctioning coolant temperature sensor 
119040 mi

C $400
Malfunctioning thermostat and radiator connection resulting in total loss of coolant. 
124000 mi

C $60
Replace rotted flex pipe connection clamp that was the source of an underbody exhaust leak. 
125200 mi

C $300
Very noisy engine at hot idle. Replace failed AWM 1.8T cam chain tensioner. Also replaced timing belt during same repair job. Also replaced valve cover gaskets. 
125860 mi

C $200
Exhaust leak/noise due to corroded flex pipe connection. Replace flex pipe. 
128720 mi

C $40
Replace exhaust manifold gaskets. Was leaking exhaust fumes at manifold-to-turbo connection. 
132660 mi

C $60
Coolant leaking at engine rear side. Replaced plastic coolant flange and seals. Refill with fresh coolant. 
136400 mi Coil pack failure causing misfire. All coil packs replaced for free under recall. 
141360 mi

C $420
Replace exhaust flex pipe 
142600 mi Engine misfiring and stalling after start. Problem caused by broken jet suction pump. 

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2001.5 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed manual FWD

114700 mi

$1300
Oil sludge in engine. Clogged oil pump pickup. Lost oil pressure. Use correct motor oil!!! 
137640 mi Would not start. Timing belt skipped is what mechanic said. Tired of problems with this car so I sold it without repair. 

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2001.5 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed manual AWD

170000 mi

US $300
Oil leaking slowly from cam tensioner seal. Intermittent oil burning smell in the cabin. Replaced cam tensioner seal.  
194000 mi

US $150
Thermostat replaced 
48980 mi

C $1000
Timing belt/water pump Tie rod end 
51150 mi

C $20
Replaced few broken vacuum hoses 
51460 mi

C $50
Leaky valve cover gasket 
96000 mi

US $300
Valve cover gasket and cam tensioner were leaking oil on engine. 
98000 mi

US $200
Boost change over valve "N75" had to be replaced along with a few vacuum lines. CEL hasn't returned since. 
98000 mi

US $30
Coolant Temp Sensor replaced due to erradic Engine Temp gauge. 
68820 mi

C $550
thermostat was staying open and the engine coolant temperature was too low. 
78740 mi

C $200
Cracked temp sensor. 
93000 mi

C $600
rear seal was leaking, replaced and is now fixed 
99200 mi

C $85
Check engine light came on after engine had stumbled after starting - reported engine miss 

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2001.5 Audi A4 4-door

turbocharged 4-cylinder automatic AWD

66000 mi

US $125
mass air flow sensor failed. We had noticed a drop in power, scanned the car with our scanner, and determined part of the failure. Turns out Audi had a recall on the part and had extended the warranty. Overall cost was for labor, as part was covered bu 

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2001.5 Audi A4 / S4

Engine not specified

150000 mi

US $501
EGT sensors and throttle body boot 
176000 mi

US $330
misfire -- coil pack replaced 
118000 mi

US $350
O2 sensor and EGT sensor on the driver side replaced.  

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2001.5 Audi A4 / S4 / RS4

Engine not specified

124000 mi

US $400
Replaced cat-back after hangers rusted off on old system 

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2001 Audi A4 4dr Wagon

turbocharged 250hp 2.7L V6 6-speed manual AWD

92000 mi

US $600
Both diverter valves for each turbo were bad along with the turbo Y pipe boot. 

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2001 Audi A4 4dr Wagon

turbocharged 170hp 1.8L I4 5-speed manual AWD

107000 mi Four new coil packs. 
119000 mi

US $500
No power to fuel pump and coil packs. There was a dead short that also caused the fuel pump relay to fail. 
132300 mi

US $1700
Original clutch failed dramatically, friction material broke into three pieces, flywheel worn beyond resurfacing. 

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2001 Audi A4 4dr Sedan

turbocharged 250hp 2.7L V6 6-speed manual AWD

108000 mi

US $10170
Replaced turbochargers. 
104500 mi

US $430
Vacuum leak, leading to sensor trips and check engine light. Bad valve replaced. 
107000 mi

US $151
Heater not heating properly -- blowing cool air. Coolant level topped of, heater core purged. Helped a little, but heater still not working as it should. Repair would be ~$2000 -- mostly labor to remove dash. 
155200 mi

US $4000
Replaced clutch. 
156300 mi

US $819
Leaking gas line and fuel filter 
158000 mi

US $247
Broken muffler side clamps; leaking exhaust; warning light 
57000 mi

US $2000
Replacement of O2 sensor, knock sensor and CTS sensor. 
83000 mi

US $305
replaced serpentine belt 

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2001 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed shiftable automatic FWD

83000 mi Check engine light on. P0171 code. Not repair yet. Research being done currently to see what code stand for. 

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2001 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed shiftable automatic AWD

76260 mi

C $125
Rear Oxygen Sensor 
99200 mi

C $60
Engine suddenly got noisy, suspected muffler, but was only a rusted clamp. 
156000 mi

US $1800
Timing belt replacement 
164000 mi Temperature sending unit was faulty 
160000 mi Header had been broken for a while. 
65000 mi

US $500
In for Oil & Filter Change. Evidence of slight coolant leakage from Water pump. Replaced pump, timing belt, pulley, tensioner, belts and fan clutch. 
109000 mi

US $370
Intermittent check engine light for several weeks, car running perfectly. Tech decoded error log "fuel trim too lean". Replaced Air Flow sensor to correct problem. No further trouble. 
69000 mi

US $300
Bad idler tensioner bearing and secondary pulley bearing. Originally diagnosed as water pump 

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2001 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed manual AWD

125000 mi

US $45
Coilpack 
103000 mi

US $64
Car was reporting lean fuel condition. MAF was replaced. 
104000 mi

US $250
Poor fuel economy -replaced MAF, and O2 sensors 
117300 mi

US $1500
Replaced manifold discharge pipe 
243000 mi

US $250
Valve cover gasket replacement - leaking 
249000 mi

US $225
Backflush heater core - clogged/no heat Replace oil temperature sensor  
259000 mi

US $330
Backflush heater core - clogged/no heat, $130 Replace oxygen sensor after CEL, $200 
270000 mi Backflush heater core - clogged/no heat 
275500 mi

US $400
The ECU actually died! Of all things to break, I wouldn't have thought the ECU to die. There was no moisture of any sorts. 
194780 mi

C $1800
Oil light came on. Cause was oil pump. Pump replaced. At same time replaced timing belt.  
220100 mi Rough idle. All vac leaks repaired. No improvement. 
143300 mi

US $500
Exhaust blowing white/blue smoke. Turbo charger had a fair amount of in-and-out shaft play. Removed turbo to rebuild it. Upon draining the oil, it looked mixed with coolant. Suspect head gasktet needs to be replaced as well. 
149700 mi

US $600
Engine mounts. 
154000 mi

US $80
Coil packs were going bad, car misfiring under boost. Found that the previous owner had 3 different coil part numbers in the car. Replaced with VW/Audi recommended part # for the engine. 
159000 mi

US $30
Car was overheating, replaced plastic flange on the back of the block and all O-rings to prevent future leaks. 
160000 mi Crankcase breather elbow slipped off its clip, oil would fly out of the opened hole onto the engine. Easy fix, no idea why this occurred though. 
162000 mi

US $400
clutch wore out = changing the clutch, flywheel, pressure plate and rear main seal. 
163000 mi

US $80
knock sensors were bad 
163000 mi

US $20
ECU Relay went bad 
171000 mi

US $495
Water pump leaking, alternator bolt loose(was wearing down timing belt) 
177000 mi

US $300
Misfire 

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2001 Audi A4 4dr Sedan

190-horsepower 2.8L V6 5-speed shiftable automatic AWD

122000 mi

US $450
Replaced 2 valve cover gaskets, brittle and leaking a bit of oil, and replaced o-ring on temperature sensor, leaking anti-freeze. 
144000 mi Coolant Temp Sensor 

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2001 Audi A4 4dr Sedan

190-horsepower 2.8L V6 5-speed manual AWD

72000 mi

US $200
O2 sensor 
74000 mi Check engine light, "fault P431" O2 sensor reading too much oxygen. Apparently can be cured by a spacer placed between the sensor and the catalytic converter to reduce the exposure of the sensor. But car sold before this was attempted. 
127000 mi

US $313
Flex pipe Exhaust leak right side 
162000 mi

US $1050
Catalytic converter replacement 
168700 mi

US $2100
Replaced worn clutch 
173700 mi

US $880
Coolant leak 
188000 mi

US $580
exhaust piping 
139080 mi

C $800
PCV hoses  
109000 mi

US $1000
Replaced Mass Air Flow Sensor. Replaced Timing Belt (needed) also had water pump because of high mileage but it was still working fine before 

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2001 Audi A4 4-door

turbocharged 6-cylinder manual AWD

155000 mi

US $400
Replaced fuel injector. Replaced oxygen sensor. 

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2001 Audi A4 4-door

turbocharged 4-cylinder manual AWD

122000 mi

US $650
Secondary Air injection code thrown (self diagnosed). Replaced several vacuum lines and a valve. Rattle from front left turned out to be l Engine gasket leaking (smelled oil), replaced gasket. 
124000 mi

US $35
Misfire on Cylinder 2. Car was idling rough w/ no reduced power. Swapped coilpacks 2 and 3, misfire jumped to cylinder 3. Determined it was faulty coilpack, replaced with part from dealership 

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2000.5 Audi A4

Engine not specified

134000 mi

US $225
Car needed new mass air flow sensor and coil pack 

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2000 Audi A4 4dr Wagon

turbocharged 150hp 1.8L I4 5-speed manual AWD

154000 mi

US $500
Replaced leaking coolant hoses, flush, refill, and pressure test. 
131000 mi

US $550
Replaced coolant thermostat  

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2000 Audi A4 4dr Wagon

190-horsepower 2.8L V6 5-speed shiftable automatic AWD

95000 mi

US $500
both flex pipes needed to be replaced.  

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2000 Audi A4 4dr Wagon

190-horsepower 2.8L V6 5-speed manual AWD

78000 mi

US $350
valve cover/cam tensioner gaskets 
80000 mi

US $10
Improper warm-up characteristics from initial start up 
82000 mi

US $100
replace leaking radiator 

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2000 Audi A4 4dr Sedan

turbocharged 250hp 2.7L V6 6-speed manual AWD

140000 mi

US $300
ABS contoller wasn't working. Got it fixed by ModuleMaster.com 
173600 mi

C $950
Heater core a major repair, whole dash had to be removed. Audi quoted 18 hours min and suggested I not fix and keep as summer car. Worried about creating rattles. Local mechanic did work over 2 weeks, says will never do it again. 
103000 mi

US $300
Thermostat failed - replaced Thermostat and water pump (both original) timing belt, serpentine belt, associated hardware. 
75000 mi

US $3000
Removed engine & transmission to replace clutch and all mounts. Replaced timing belt & water pump. Cleaned up all turbo "plumbing." 
69700 mi

US $200
fuel evap canister leak o2 sensor failed 
72000 mi

US $194
Engine had a plugged vacuum line which caused rich and lean running conditions. 
92000 mi

US $3000
fixed oil leak from one cylinder head. 
110000 mi

US $1000
One valve cover had a small leak, replaced both valve cover gaskets while in there for timing belt. 
175000 mi

US $212
Heater core hoses replaced 
181000 mi

US $497
Replace Aux fan 
49600 mi

C $1800
Replaced 2 oxygen and 1 temperature sensors. 
74400 mi

C $140
Fuel filter was leaking, repaired same day. 
76220 mi

C $3000
Rocker cover gasket leak 
59000 mi Oxygen sensor replaced. Cost included in purchase price of car. 
69000 mi

US $800
Replaced both ignition modules. 
94700 mi

US $3799
oil leak coolant leak engine misfire, suspected bad injector(s), repaired with injector cleaner 
112000 mi

US $310
Turbo pressure hose was replaced. 

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2000 Audi A4 4dr Sedan

turbocharged 250hp 2.7L V6 5-speed shiftable automatic AWD

71000 mi

US $2000
Replaced valve cover gaskets. Found RH turbo leaking oil. 

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2000 Audi A4 4dr Sedan

turbocharged 150hp 1.8L I4 5-speed shiftable automatic AWD

103850 mi

C $220
Replace rear coolant flange  

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2000 Audi A4 4dr Sedan

turbocharged 150hp 1.8L I4 5-speed manual FWD

191000 mi

US $390
Main relay was replaced because car was intermittently starting. 
82000 mi

US $500
Vacuum leak, bad oxygen sensor. Leaking timing chain cover gasket. Estimate $500. Decided not to fix because I needed the car back that day. 
113000 mi Needs valve cover gasket. Update: I don’t think it really needed to be replaced - I since caught that shop more than once recommending repairs that they had already done! 
122000 mi

US $170
Exhaust system leak. Replaced flexible pipe section. 
130000 mi

US $300
Cooling system leak 

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2000 Audi A4 4dr Sedan

turbocharged 150hp 1.8L I4 5-speed manual AWD

78000 mi

US $7500
Check engine came on and 20 miles later, car died. Cam shaft seized, something to do with not getting oil, no oil pressure light came on though, pistons bent the valves, got a new cylinder head and cam shafts. turbo seized also. rebuilt. 
128000 mi

US $350
motor misfire on cyl#2.Tech swapped injectors&ignition coils before finding 30psi lower compression on#2.Audi dealer did same thing&wanted to pull cyl head@$500 just to remove. Declined this. Friend&I-changed MAF.CEL-gone!Safetyinspectionok 
132000 mi

US $250
Breather assembly and o-rings, hose were dried and cracked, leaking oil underneath the intake manifold Replaced assembly. Driving down the road at 70mph, 38° F cold day. Engine threw a connecting rod. Total Engine failure, hole through both sides of the block and oil pan. Block destroyed. Crank,timing belt, head fine. Got used block $150 waiting to finish. 
130039 mi

US $250
Catastrophic engine failure@70mph on Hwy. #2 con rod broke in half,cracked both sides of block & oil pan. Block is gone timing belt was still attached,cylinder head fine, motor rotates ok. #2 crank journal good. Rod Fatigued-$4K estimated 
132000 mi

US $3000
Engine Rebuilt from broken con rod last year. Rebuilt head, new eagle rods, main and rod bearings, piston rings, all gaskets, single mass flywheel clutch pressure plate, oil pump,2 intake,1 exhaust valve on #2 cyl replaced, self built. 
133000 mi

US $55
Coolant expansion tank was starting to craze, plastic was starting to leak at the seams. Replaced it with a new one for $30 plus coolant. 
134000 mi

US $35
Ignition coil number 1 failed, replaced after running VAG-Com software, $30 and 10minutes of work. 
137265 mi

US $200
CEL error code P0102 low signal Mass Flow Meter. Strange because had replaced this 15,000 miles ago. Bought used MAF for $50. Changed coolant tank(old and yellow), new oil cooler and hoses/clamps changed. Cleared trouble codes-car runs great 
135000 mi

US $100
Both motor mounts replaced. Had been leaking since 75k miles 
136449 mi Water Pump @ 122K 
166780 mi

C $1700
Engine was not warming up, installed a new thermostat. 
140000 mi

US $50
Secondary Air Pump system was causing CEL light. I had the system written out of the ECU since it is useless. No more CEL and forced ready for inspection. 
181000 mi

US $100
Replaced leaking coolant pump. 
185700 mi

US $700
Fuel pump replacement 
190000 mi Washed MAF sensor 
193000 mi

US $400
Front O2 and MAF sensors replaced. 
199500 mi

US $400
replaced valve cover gasket and chain tensioner. 
211700 mi

US $200
coolant flush 
213000 mi

US $400
coolant flange leaked 

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2000 Audi A4 4dr Sedan

190-horsepower 2.8L V6 5-speed manual AWD

108000 mi Identify source of "boiling coolant" smell; tighten hose clamp at coolant reservoir to reduce leaking. 
111000 mi

US $1946
Leaking coolant. Replaced heater core. Smoke from hood indicated burning oil. Replaced valve cover gasket & cam adjuster gasket, cam plug. 
105000 mi

US $200
Plugged breather pipe. Increased oil consumption and leakage. 
110000 mi

US $90
Oxygen Sensor replacement 
110000 mi

US $25
Replaced engine coolant temperature sensor and cleared engine code. 

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2000 Audi A4 / S4 4-door

turbocharged 6-cylinder manual AWD

142000 mi

US $500
Auxiliary coolant pump exploded Multiple gaskets leaking oil over time 
120000 mi

US $200
Coolant overflow tank was cracked. This is the second one. 

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2000 Audi A4 / S4 4-door

turbocharged 4-cylinder automatic AWD

47000 mi

US $600
Cam tensioner gasket seal. 
47000 mi

US $300
Crank case breather tube/pcv valve needed replacing. Dipstick tube replacement. 
49000 mi

US $1000
Water pump leaking, thermostat malfunction. 
51000 mi Flex pipe rusted out, had replaced 

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2000 Audi A4 / S4 4-door

6-cylinder manual AWD

153000 mi

US $50
Noisy serp belt tensioner replaced. 
169000 mi

US $150
Flex pipe leak 
120000 mi Oil leak from the upper oil pan gasket (apparently the upper is more expensive to replace than the lower one which had already been replaced. 

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2000 Audi A4 / S4 / RS4

Engine not specified

93000 mi

C $200
Car would stall when slowing to a stop. Mechanic cleaned throttle body. 
142000 mi Had to replace the turbocharger for the third time. Borg Warner K03 turbos are trash. 

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1999.5 Audi A4

Engine not specified

88000 mi

US $1650
Oil leaks persistent since  

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1999.5 Audi A4 4dr Wagon

turbocharged 150hp 1.8L I4 5-speed manual AWD

164000 mi

US $160
Replaced cylinders 3 & 4 ignition coil packs. Coil packs 1 & 2 previously replaced. 
180000 mi

US $305
Replaced mass air flow sensor 
187000 mi

US $127
Coolant inlet hose connection to valve cover. 
104000 mi

US $120
Damaged flex/downpipe 
105000 mi

US $50
MAF causing lean code - Replaced with new MAF 
115000 mi

US $200
Broken downpipe, replaced with new one under product warranty 
117000 mi

US $2000
Valve cover and cam seals leaking oil. 
124000 mi

US $400
Turbo wastegate failed. Replaced turbo with used K04 turbo. 
131000 mi

US $50
Crankcase breather hose had a crack in it. Replaced 
142000 mi

US $250
Broken flex downpipe 

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1999.5 Audi A4 4-door

turbocharged 4-cylinder manual AWD

75000 mi

US $50
Main fuel line connecting to the fuel rail spit and required replacement. Ordered part and installed after receipt. Part took 3 days to arrive, and car was fixed after we returned from vacation. 
90000 mi

US $1500
Replaced valve cover gasket - leaking from rear of engine. 
91000 mi

US $400
fuel pump leaking, bent outlet pipe. replaced with new one. 
102000 mi

US $500
fuel leak out of top of tank - the cap on the tank failed, causing a rather large leak 

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1999.5 Audi A4 4-door

4-cylinder automatic AWD

106000 mi

US $300
Idler pulley bearing failed. 

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1999 Audi A4

Engine not specified

111000 mi

US $250
Broken valve cover gasket, coolant temp sensor, cam shaft seal and oil cooler o-ring 

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1999 Audi A4 4-door

turbocharged 4-cylinder automatic AWD

162000 mi

US $167
The flexible coupling part of the post catalytic converter exhaust system was replaced due to holes in it. 
173000 mi

US $400
Oil seal on tensioner leaked 
177000 mi

US $243
The coolant temperature sensor had gone bad and needed to be replaced. 
184000 mi Main seals were leaking, also belt tensioner 

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1999 Audi A4 4-door

6-cylinder automatic AWD

185000 mi Leaking rear main oil seal when car sold. I put up with it, mostly because I am pretty anal about maintenence. I was losing about 1/2 quart every 3,000 miles. 

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1999 Audi A4 / S4

Engine not specified

106000 mi

US $350
Car ran rough and barely started exhaust system failure 
118000 mi

US $100
Broken serp belt/leaky water pump. 

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1999 Audi A4 / S4 4-door

turbocharged 4-cylinder manual AWD

145000 mi

US $800
tensioner for timing belt failed, causing three valves to bend - renewed valve head with new Start, then stopped after 1/2 block, determined failed fuel pump, towed to residence removed and replaced Fuel pump and filter corrected problem. 
156000 mi

US $56
Leaking coolent - heater bi-pass hose failure 
164000 mi

US $20
Coolent leak- "O" ring failure at coolent flange, remove and replace - corrected leak that has been progressively getting worse. Now correct pressure and temp operation. 

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1999 Audi A4 / S4 4-door

6-cylinder manual AWD

135000 mi

US $430
Check Engine light, would not pass emission check. Replaced both Post Cat oxygen sensors. $240 in Parts, $190 in Labor 
185000 mi

US $1600
Also air sensor fried Needed new thermostat (requires removal of timing chain). 
188500 mi

US $1000
Cam seals redone; transaxel seals redone. 

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1999 Audi A4 / S4 4-door

6-cylinder automatic AWD

106000 mi Leaking a lot of oil and coolant when sold. 

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1999 Audi A4 / S4 4-door

4-cylinder automatic 2WD

182000 mi

US $855
Vehicle faulty codes indicate a malfunctioning throttle body and secondary air induction system. 
193000 mi

US $340
Dealership service tech discovered leaky cam seals 
193000 mi

US $600
Replacement of engine seal causing oil leak. 

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1998.5 Audi A4 / S4

Engine not specified

137640 mi

C $1200
Rough idle. Relearned IAC motor and no further issues. 
140520 mi

C $850
Oil cooler leak. 
272000 mi

US $300
oil cooler gasket failure 

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1998.5 Audi A4 / S4 4-door

turbocharged 4-cylinder automatic AWD

98000 mi

US $900
Ignition control block was replaced. 
99000 mi

US $140
Oil leak at the oil filter housing gasket - oil light came on - replaced gasket. 
104500 mi

US $1200
MAF and oxygen sensor 

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1998.5 Audi A4 / S4 / RS4 4-door

6-cylinder manual AWD

98000 mi

US $1100
Air flow meters problem. Radiator was leaking 
150000 mi

US $169
Replaced oil suction pump and associated tubing 
155000 mi

US $3500
replace both converters and flex pipe Timing belt, waterpump, cam tensioner seals, cam plugs,valve cover seals, front crank seal, basically the entire engine was resealed 

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1998 Audi A4 / S4

Engine not specified

177000 mi

US $200
Leaks on oil cooler hoses and water outlet on rear of head. Replaced engine oil cooler...leaking coolant...pinhole in coolant nipple. Replace front and side engine mounts 
68000 mi

US $660
Put in rebuilt turbo because wastegate actuating rod disconnected from actuator. 

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1998 Audi A4 / S4 4-door

6-cylinder manual AWD

187000 mi

US $3400
Items replaced: valve cover gaskets, cam seals, cam tensioner, water pump, timing belt, other odd parts + labor. 

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1998 Audi A4 / S4 / RS4 4-door

turbocharged 4-cylinder manual 2WD

120000 mi

US $50
engine misfire caused by ignition controller module broken. 

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1997 Audi A4 / S4 4-door

6-cylinder manual AWD

136000 mi

US $560
Rear differential mount broken - shop replaced mount. 
141000 mi

US $880
one of the two cats had died a very noisy death. 

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Audi A4 / S4 / RS4 Engine Problems

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