2006 Audi A4 / S4 / RS4 Audi A4 / S4 / RS4 2006

We are 103,000+ car owners sharing real-world car information.

Join Us

2006 Audi A4 / S4 / RS4 repairs by problem area

Engine (55%)

Transmission and Drivetrain (5%)

Brakes and Traction Control (2%)

Suspension and Steering (9%)

Electrical and Air Conditioning (21%)

Paint, Rust, Leaks, Rattles, and Trim (4%)

Other (4%)

Chart based on 910 repairs.
See TSBs and recalls for the 2006 Audi A4 / S4 / RS4.

2006 Audi A4 / S4 / RS4 engine repair cost distribution

$2500+ (7%)

$1000 - $2499 (19%)

$500 - $999 (14%)

$100 - $499 (29%)

< $100 (32%)

Worried about potential repair costs? An extended warranty can provide peace of mind.

Chart based on 283 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

2006 Audi S4 4dr Wagon

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

77000 mi

US $2000
dying fuel pump 
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. 

Return to top

2006 Audi S4 4dr Wagon

340-horsepower 4.2L V8 6-speed manual AWD

80000 mi

US $700
Replaced cracked coolant overflow reservoir 
98000 mi

US $315
Upper coolant hose had small leak, replaced hose 

Return to top

2006 Audi S4 4dr Sedan

340-horsepower 4.2L V8 6-speed manual AWD

83700 mi

US $600
Broken serpentine belt. 
77000 mi Ignition coils failed, replace under factory campaign they were paid by Audi $138.  
35000 mi

US $288
Exhaust pipe brackets failed. 
49000 mi

US $384
valve gaskets beginning to mildly seep 
126000 mi

US $180
Replaced all spark plugs, air filter, two coil packs, and a PCV container / valve assembly. 
128000 mi

US $350
Replaced serpentine belt. Replaced manual belt tensioner and idler pulley with automatic tensioner conversion from JHM. Replaced the snub nose bushing. Replaced spark plugs. 
133000 mi

US $4200
Cam adjusters failed 
57800 mi

US $1700
Serpentine belt was cracked and showing wear (replaced). 
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. 
121000 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 

Return to top

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 
63500 mi

US $1400
Valve cover gasket leaking x 2 Serpentine belt pulley got stuck, shredded belt partially, but could be freed / lubricated. 
61500 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 

Return to top

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. 
123000 mi

US $2000
coolant tank replaced, hoses replaced 
135000 mi

US $2000
engine mounts replaced 

Return to top

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 $90
Engine light, cooling system. Failed injector coil pack 
160000 mi

US $30
Replaced purge valve 
162000 mi

US $35
Failed Ignition Coilpack 
167000 mi

US $1475
Valve cover seals, front crankshaft seal, camshaft seal, timing belt and water pump. Refill coolant, oil and filter change. 
49620 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. 
77900 mi

A $3000
Fuel pump cam follower failed damaging the cam shaft 
64000 mi

US $85
Sluggish acceleration, fixed with software reflash 
69200 mi

US $85
Evaporative System valve replaced 
77000 mi

US $85
Fuel pump replaced for second time! 
58000 mi

US $450
Both engine mounts damaged. One is collapsed, the other is leaking. Certification hassle with my shady dealer. 
60300 mi

US $85
Broken engine mounts replaced by another, more conscientious dealer. 
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 ... 
54560 mi

€500
Wrong spark plugs installed in the shop. Caused one or more coil packs to fail and eventually also the motor management fuse. Misfire and a broken cat. 
66340 mi

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

Return to top

2006 Audi A4 4dr Wagon

turbocharged 200hp 2.0L I4 6-speed manual AWD

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. 
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. 
95505 mi

US $20
Center muffler hanger broke from muffler, added stress to rusting midpipe clamp and clamp eventually failed. Replaced clamp, repaired exhaust hanger 
131000 mi

US $900
Mid muffler pipe rotted. replaced with aftermarket full SS as it was roughly the same price as OEM mid muffler parts. 
77700 mi

US $800
Losing fuel pressure causing the check engine light to come on. 
53000 mi

US $75
Clutch Pedal Position switch failed, diagnosed and replaced myself 
104500 mi

US $98
Boost leak, vacuum line cracked, replaced. 
156240 mi

C $4000
Exhaust cam and position sensor 
40920 mi

C $213
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 Camshaft carrier leaking oil. Install new gasket and sealants. ?consequence of previous warranty repair by dealer. Repaired under extended warranty 
45880 mi

C $2200
Camshaft carrier leaking oil. Install new gasket and sealants. ?consequence of previous warranty repair by dealer. 
78120 mi

C $3400
Clutch and flywheel replacement 
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. 
60500 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. 
97200 mi

US $350
Replaced timing belt, water pump (still working), thermostat (not working, stuck open), timing belt tensioner, acc belt. 
120000 mi

US $70
Replaced cam timing solenoid because it was leaking oil externally and set a check engine code 
124000 mi

US $181
Middle resonator hangers no longer attached to resonator. Replaced with aftermarket direct fit piece that requires a little cutting. 
66000 mi

US $860
motor controlling valves failed 
68000 mi

US $300
Turbo blow off valve replaced 
73000 mi

US $2200
Clutch was replaced. 
180000 mi

US $1000
Rear timing chain broke and needed replacement. 
127000 mi

US $1650
Power steering pully loose, took out fan belt. Power steering pump needed to be replaced as well as fan belt 
126000 mi

US $1200
Engine not coming to temperature, needed thermostat replaced. 
127000 mi

US $2700
Lost oil pressure in engine. Oil pump failure and chain broke. Part alone was almost $1400. $300 just to diagnose and identify extent of failure. Remainder to handle repair/replacement of new part, fluids, etc... 
150000 mi

US $20
Slight oil leak from back of engine head. Oil leak appears to have been coming from vacuum pump. 
157000 mi

US $240
Replace fuel filter and fuel pump. Fuel filter had never been changed, after changing a CEL came on for too low of duty cycle on fuel pump. It was only because of the filter change, but researched it more and found out how to read the duty cycle in VAGCOM and it was actually reading around 76% at idle. Deciding to preventatively change the pump although it appeared to work fine. New fuel pump is around 50%. I believe the pump had premature wear due to the fuel filter never being changed. 
163000 mi Cleaned carbon deposits on intake valves. Replaced oil filter housing that leaked in very cold weather. 
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. 

Return to top

2006 Audi A4 4dr Wagon

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

64000 mi

US $500
fault code (Check engine light) 
82700 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. 
85300 mi

US $900
vacuum pump valve cover gaskets 

Return to top

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. 
122760 mi

C $2000
Flex pipe on RHS is broken. Estimated parts cost is $1500 alone plus $500 labour. Yikes. Intake flaps on one bank are stuck closed. Need to dismantle intake assembly to check problem repair-ability, which at the least requires $100 in gaskets, even if nothing is done. Valve cover gaskets are leaking oil again. The leak is bad enough to fill the spark plug wells causing misfires. 

Return to top

2006 Audi A4 4dr Sedan

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

71000 mi

US $980
Fuel pump needed replacement. Fuel pressure was low. 
72000 mi

US $362
Changed sensor & Oil change etc. 
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. 
83400 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. 
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. 
82300 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) 
88600 mi

US $120
Mis-fire on cylinder 4.Causing blinking CEL engine vibration and rough running. Replaced all 4 coil packs and new sparkplugs.Earlier set was replaced under recall.This is third set for this car. Autozone coilpacks with lifetime warranty 
100000 mi

US $1000
Random misfires after driving for about 30 minutes. All coil packs replaced under lifetime warranty. Intake removed and intake valves manually scraped and cleaned to remove carbon buildup. So far mis-fires have been resolved and have not returned even after extended driving periods. 
46000 mi Replace coil packs. 
52500 mi

US $85
Busted coolant hose. 
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. 
43042 mi

US $203
Replaced Breather Valve Replaced Breather Valve. Check Engine Light, Shaking of car. 
60300 mi

US $318
Tear in the Turbocharger Recirculation Valve. Check engine light. 
55000 mi

US $130
Ignition coil failure / replacement . Towed 
44000 mi Cylinder 3 & 4 coil packs bad; turbo recirculation valve bad 
53000 mi

US $85
PCV unit bad or leaking 
55900 mi Defective coil pack (#1) 
72300 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 
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 
102600 mi

C $3400
Leaks and knocking. Replaced engine. 
108500 mi

C $350
Fuel pressure sensor 
65372 mi Cooling Fan repair to fix incorrect service that was previously performed. 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. 

Return to top

2006 Audi A4 4dr Sedan

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

99000 mi

US $200
Diverter valve diaphram torn, replaced valve 
58000 mi

US $200
Turbo recirculation valve PCV Valve 
89000 mi

US $1000
Engine mounts replaced, both side. Right side failed. 
87000 mi

US $1700
fuel sensor, serpentine belt replaced. a cam on the camshaft had to be replaced as metal part that drives mechanical fuel pump wore out and caused the cam to wear down. 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 
122000 mi

US $400
CEL went on; had to replace intake valve 
140800 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). 
171000 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. 
209800 mi

US $1063
Thermostat replaced.  
265000 mi

US $1500
Pressure regulator replaced 
292000 mi

US $1600
Alternator failed,  
301000 mi

US $280
Spark plugs and new coils 
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 Accelerating until approx 110km/h, power cuts for a couple of seconds and then resumes. Replacement was camshaft and related parts. A jolt while accelerating. Did not happen again but check engine light remains. One coil was replaced for misfire. 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. 
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. 
28000 mi Car would not accelerate past 4000 RPM. Technical bulletin on fuel pump and cams/cam follows. Fuel pump and cam parts replaced. 
54800 mi

US $750
Replaced worn engine mounts 
57500 mi

US $350
Thermostat failure with CEL. 
60000 mi

US $54
Failure of diverter valve before turbo. Replaced with newer version from Audi. 
68200 mi

C $170
needed to replace the mass airflow sensor, other than that the engine is running strong. 
69800 mi

C $340
Have to get the mass airflow sensor replaced again, plugs had to be changed also... 
105300 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. 
108000 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. 
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, 
65800 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. 
86700 mi

US $4200
Engine mount leaking fluid - replaced 
30500 mi Intake manifold flapper motor failed. 
109200 mi

US $4286
Replaced High Pressure Fuel Pump, Sensor & Camshaft Follower (follower is a common wear item on 06-07 MY 2.0T engines, was not inspected by previous owner, caused damaged to HPFP and Intake Camshaft). $528. Replaced Intake Camshaft with Cam Chain & Tensioner (proactive). $1270. Replaced rear timing cover housing w/controller solenoid due to oil leak and solenoid error code. $720. Replace Boost Diverter Valve, common wear item on early 2.0T engines. $250. Replace Fuel Filter. $50. 
117800 mi

$400
Replaced the HPFP and cam follower. Discovered worn camshaft. I replaced the intake camshaft and head gasket. 
143900 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. 
118700 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. 
140400 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. 
139200 mi

$1000
Changed my radiator as it was leaking. Replace both left and right engine mountings. Replace both left and right transmission mountings. 
42000 mi Turbo valve issue, and low fuel sensor problems. repaired via warranty 
46000 mi Another turbo valve issue repaired via warranty. 
29140 mi Pressure regulator valve malfunction resulted in check engine light. Part replaced and problem solved on same day in less than an hour. 
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. 
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 
163000 mi

US $75
Heater core flush and coolant flush 
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 
108900 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 
119440 mi

C $2500
Oil leak in cylinder - repair required. 
Engine vibrates excessively at idle rpm. Audi claimed it was normal. 
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). 
64700 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. 
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. 
109120 mi

C $600
Car was stalling once in a while either idling or cruising at highway speeds and not starting when attempted once stalled. It would start without an issue when cold and would act normal for a few days and stall again. Replaced fuel pump. Initially paid $900, later refunded. High Pressure Fuel Pump failure, as indicated by scanner. But this didn't fix the issue. 
109740 mi

C $500
Picked up the car after the repairs the day before. Dealer had replaced the gas pump, as the car was stalling for no reason while running. But it stalled again on the way home from the dealer. They found out that the low pressure fuel sensor was defective. It was replaced at their cost and the difference between the fuel pump and the sensor was refunded to me as per my request. 
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. 
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.  
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. 
110000 mi

US $500
ECU still thinks that fuel pressure is low when it isn't. 
78000 mi

US $90
Coil pack failure at cylinder 1, replaced all 4 coil packs. 
17000 mi Car brought in for scheduled oil change, tech discovered a code and replaced the faulty intake flap motor 
141000 mi

US $57
replace exhaust flex connection engine misfire. replaced two ignition coils number 3 and 4 failed one day apart. first number 3, next day number4 also failed. 
143000 mi

US $46
replaced 2 more ignition coils 
156000 mi

US $4000
valve cleaning, emission system replace timing belt and water pump and thermostat 
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. Failed PCV valve detected and replaced. 
39700 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 
45360 mi yellow check engine light on problem with intake manifold repaired on second attempt 
58900 mi

C $150
failed thermostat replaced 
63800 mi broken camshaft damaged engine which waas replaced by Audi! 
92000 mi

US $3000
coolant leak 
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 
57000 mi

US $1211
Engine mount replaced, transmission fluid change / filter kit. 
95200 mi 2.0T engine Cam follower 

Return to top

2006 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 6-speed manual FWD

62900 mi

US $100
Replaced thermostat 
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 
29000 mi Bought in early April, When detailing the engine the dealer got the ingnition coils wet, caused two of them to go bad. Dealer replaced all 4 at no cost and have not had a problem since.  

Return to top

2006 Audi A4 4dr Sedan

turbocharged 200hp 2.0L I4 6-speed manual AWD

150300 mi Leak Detection Pump replacement. 
110700 mi

US $25
Replaced bad coil pack. 
116000 mi

US $75
Had an issue with another coil pack and just replaced the other 3 packs, it took longer to drive to the nearest Autozone then it did to replace them. 
121000 mi

US $25
Replaced the Vapor Canister Purge Solenoid which was creating difficult starting and check engine light 
141000 mi

US $1600
variable cam adjuster sprocket failed, also replaced the timing chain and adjuster while the back end of the engine was apart. 
148000 mi

US $25
Replaced 2 more coil packs, the previous coil packs only lasted about 2 years. 
69800 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 
94200 mi

US $900
replace engine mounts to pass PA state inspection 
98350 mi

US $526
CEL - replaced all four spark plugs and coils 
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. 
147000 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 
260000 mi

US $600
Vacuum leak in emissions control housing 
67000 mi

US $400
replace ignition coils 
74000 mi

US $2000
Replaced camshaft Replaced fuel pump 
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 
123000 mi

US $1800
Worn clutch was replaced.  The oil filter housing had a small crack and was replaced as well. 
78500 mi

US $420
Replace malfunctioning thermostat. 
100000 mi

US $1763
Engine control module failed requiring replacement. 
85500 mi

US $1300
Replace coolant flangs 
108900 mi

US $185
Replace valve cover gasket 
111000 mi

US $192
Replace vacuum pipe 
111900 mi

US $332
Ignition coil failure, replaced coils and spark plugs. 
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. 
29000 mi Intake flaps were not working correctly. A common problem. 
40000 mi Replaced the CAT. 
49000 mi The deadly camshaft code 
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 $1400
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 
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. 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. 
32780 mi Car was shaking violently. Dealer scans idicated that the diverter valve was faulty. 
34300 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. 
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. 
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. Diverter valve replacement after taking into dealer for check engine light diagnosis. 
109000 mi

US $5600
Previous mechanic neglected to repair all faults in motor after camshaft/follower repair. Oil pump balance shaft was damaged and caused engine failure after "repairs" were complete. Don't go to Dave's European in Denver. New long block. 
33000 mi Faulty IRMC valve replaced. CEL cleared. 
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. 
83100 mi The August repair installed the wrong cam. This took 3 months to figure out. 
76880 mi Engine coils repaired under warranty 
77800 mi Hydraulic Engine supports leaked => replaced 
109740 mi

$150
Engine cooling system (radiator, water pump, thermostat, heater core, etc.), repair 
25000 mi

US $205
software update, no problems noticed with vehicle. 
34000 mi Power loss during hard acceleration. Unspecified software update. 
74000 mi

US $60
Engine temperature was not stable. Thermostat was purchased to repair problem but I was unable to perform the repair. 
15000 mi Water pump replaced 
25000 mi Pressure Control Valve (PCV) replaced 
30000 mi Diverter Valve replaced 
55000 mi Pressure Control Valve (PCV) replaced 

Return to top

2006 Audi A4 4dr Sedan

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

47120 mi

$1000
CHANGING THE CATALYTIC CONVERTER 

Return to top

2006 Audi A4 4dr Sedan

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

64800 mi

$550
Flap intake valve fail 
73020 mi

$1
Tandem pump gasket failure. Replace only the gasket Engine intake manifould flap failure. Replace it 
88660 mi

$305
Change glow plugs and EGR Valve. Engine mounts. 

Return to top

2006 Audi A4 4dr Sedan

255-horsepower 3.1L V6 7-speed shiftable CVT FWD

106000 mi

US $150
misfire on cylinder 2 as per code reader. Replaced spake plugs and leads. appears to have solved the problem 
106000 mi

US $1400
catastrophic engine failure related to injection system. replaced 3 injectors and cleaned entire injection system. Did not fix the problem so sold vehicle. 

Return to top

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 
16000 mi

US $75
Broken exhaust bracket - replacement bracket installed. 
151000 mi

US $600
motor munt broken 
120280 mi

C $900
Replace all fuel injectors 
159700 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. 
226920 mi

C $630
Fixed oil leaks, cam sensor seals shot. 

Return to top

2006 Audi A4 4dr Sedan

255-horsepower 3.1L V6 6-speed manual AWD

43000 mi

US $1000
High pressure fuel pump 
66900 mi

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

Return to top

2006 Audi A4 2dr Convertible

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

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. 
85000 mi

US $800
Third time cooling system needs repair in less than 20k miles. 
88200 mi

US $100
Coolant temp sensor leak. 
89000 mi

US $100
Another leak in cooling system where it connects to heating. Bypassed heating as that would have be $1,250. So no more heating ... 
61000 mi

US $1700
Leak in Oil pan. Replaced oil pan cover and seal. 
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. 
42000 mi Low Coolant Warning Light - noticed liquid on garage floor. Called dealer, he suggested towing to dealership. Plastic plug was found cracked and replaced. 

Return to top

2006 Audi A4 2dr Convertible

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

62500 mi

US $50
Coolant reservoir cracked and leaked, replaced at home. 
70000 mi

US $1600
Leaky valve cover gaskets. Replaced as part of larger service trip. Replaced water pump, thermostat, and coolant crossover pipe to correct temp issues. Replaced worn timing and serpentine belts and related tensioners/spindles/whirly things. 
53100 mi Secondary Air Pump was reporting leak. Recvd check engine code 

Return to top

2006 Audi A4 / S4 / RS4

Engine not specified

106900 mi

US $2500
Thermostat, water pump 
138000 mi

US $125
Valve head gasket oil leak 

Return to top

2006 Audi A4 / S4 / RS4 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.  

Return to top

2006 Audi A4 / S4 / RS4 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. 

Return to top

See TrueDelta's information for all Sedans, Wagons, and Convertibles.
See TrueDelta's information for all Audi models.

2006 Audi A4 / S4 / RS4 Engine Problems

See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how frequently 2006 Audi A4 / S4 / RS4 problems occur, check out our car reliability stats.