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2002 Audi A4 / S4 / RS4 repairs by problem area

Engine (52%)

Transmission and Drivetrain (9%)

Brakes and Traction Control (6%)

Suspension and Steering (12%)

Electrical and Air Conditioning (16%)

Paint, Rust, Leaks, Rattles, and Trim (2%)

Other (4%)

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Chart based on 676 repairs.

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2002 Audi A4 / S4 / RS4 engine repair cost distribution

$2500+ (5%)

$1000 - $2499 (10%)

$500 - $999 (14%)

$100 - $499 (35%)

< $100 (36%)

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Chart based on 261 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

96000 mi US $2000	Head gasket failure
97000 mi US $1750	Rear main oil seal leak

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99000 mi

US $950

Replaced - breather hose, crankcase vent valve, valley pan gasket, etc. Oil change.

184600 mi

US $300

POS sensor was bad

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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.

52600 mi

Timing belt plus water pump, upgraded diverter valve, replaced gaskets (leaking minimally).

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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 $715	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.
165000 mi	Fuel pump went bad. Remove and replace.

112000 mi

US $500

o2 sensor went bad. Replaced all 3 to avoid going back at later time.

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161700 mi

US $1600

Head gasket blew oil in coolant

91500 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
98000 mi	pcv return hose needed replacing when sold

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154000 mi

US $50

Replaced o2 sensor

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.

85000 mi

US $400

Rear coolant flange cracked.

92480 mi

C $950

Replaced Head for valve issue.

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101900 mi US $695	replaced radiator due to leak replaced radiator due to leak
105000 mi	check engine light - code indicated cat converter/sensors but no obviously problem found. Reset.

140100 mi US $575	Serpentine belt and tensioner pulley
143000 mi US $250	Coolant overflow tank often low. Tests cannot find any leaks.
143000 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.

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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.

98000 mi

US $1100

Odd noise. Turned out to be some belts that needed replacing.

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217000 mi

$180

Sensor for level of oil

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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

96800 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
125500 mi US $400	Replace broken fuel pump.
169000 mi US $120	Replaced exhaust flex pipe.

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115000 mi US $250	There was a no-start condition which the shop determined was caused by a fuel pump. Pump and filter were replaced. 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
91200 mi US $60	MAF sensor was replaced to potentially fix the CEL.
114700 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
118200 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
130000 mi	fuel pump and filter have been having issues. no start condition on 3/4/2016. this was preceded by noise coming from the pump. pump is to be replaced Fuel Pump and filter replaced. Fuel pump gasket was ordered but not installed as it was not neccessary
133000 mi US $50	fuel gasket replaced as fuel was dripping from the tank
133000 mi US $15	VCG + Half moon seals were leaking and were replaced... successfully this time!
134000 mi US $50	Attempting to repair motor mounts i introduced a crack into cooling system. still not sure where the leak is coming from. Motor Mount replacements
134000 mi US $50	i believe the crack i heard during the motor mount install was from a PCV system component. replaced the entire set with silicone breather tubes i had purchased previously. replaced the coolant flange, hoses attached and the CTS. however continued leaking.
134300 mi US $50	finally finished previous repairs including the timing belt, water pump Spark Plug replacement in an attempt to address rough idle on startup
137500 mi US $50	Thermostat was leaking around housing. Temperature of car was not reaching optimal quickly enough. Replaced cat with HFC and replaced downpipes + mufflers as they had developed leaks.
140000 mi US $110	Updated parts in the PCV system
143000 mi US $80	rear o2 sensor was showing as dead - spliced in a new one.

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.
50000 mi	Leaking coolant, tightened coolant bleeder screw.
50000 mi US $50	Coilpack went bad.

92100 mi US $200	leaking valve cover gasket shorted an ignition coil
95000 mi US $300	Leaking vacuum hoses-repaired hoses
106700 mi US $280	vacuum leak
143000 mi US $80	Check engine light. Code 17544. Vacuum leak - replaced hose.

87000 mi

US $725

Radiator had pinhole leak

335000 mi

US $150

Coolant flange was leaking.

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.

70000 mi

US $640

Check engine code P1296. Replaced coolant temp sensor near firewall. Thermostat replaced.

50000 mi

US $1000

Leaking gasket seal caused a buring oil smell. Gasket was replaced.

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.

163000 mi

Timing belt and head gasket

73000 mi

US $50

Leaking valve cover on engine.

78000 mi

US $330

Oxygen sensor failed

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.
145300 mi US $650	Leak at turbo

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135160 mi

Rocker cover gasket. Cause was difficult to determine, either failure of the gasket or incorrect installation.

259000 mi

US $60

Engine temp gauge indicated running cooler than normal. I ordered the thermostat parts from an online supplier and installed them on a weekend.

19600 mi	All ignition coils.
53000 mi US $106	Engine coolant sensor. 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.

175000 mi

US $300

Radiator hoses, thermostat, and sensor replaced

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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.
143000 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.
150600 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 PCV 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

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.
125000 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.

93000 mi

US $200

Bad combi-valve throwing a check engine light. Replaced valve and fixed problem.

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.

92000 mi US $94	Coil pack D failed causing misfire. Replaced Coil pack.
98700 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.

60000 mi

US $90

Replace leaky lower coolant hose.

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

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.

80000 mi US $152	Replace Broken Vacuum Line
90000 mi US $300	Replace Coolant Temp Sensor, Replace Driver Side Wiper Arm

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
197000 mi US $500	head gasket leaking. Valve job done on head (seals replaced, etc), all gaskets etc replaced
209000 mi	thermostat sticking open
223200 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?

129500 mi

US $400

Vacuum hose connections leaky causing failed emissions testing. One hose broken. Replaced all connectors with screw-type.

77500 mi

C $200

Misfire when cold, replaced MAF, coolant temperature sensor on recommendation from my mechanic

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
120700 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 $100	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
177000 mi	Crankshaft position sensor failed, but intermittently so the car was still driveable at low throttle. Replaced on my own.

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.
247700 mi US $4300	Engine head gasket and cylinder damage. Vehicle was losing coolant slowly with no visible leaks. Coolant leaking into damaged cylinder. Machine shop repaired damage & additional components replaced as part of repair.
253000 mi	Breather hose cracked.

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

88000 mi US $450	all 4 cyl coils replaced
86500 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.
120000 mi US $1800	radiator

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.

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
130000 mi US $430	Replaced the engine speed sensor.....after 3 years it was hard to start the car without it :)
131200 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 $20	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

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20500 mi	coolant leak. Replaced valve
46631 mi	replaced catalytic converter
78500 mi US $1050	Replaced faulty Combu Valve
79000 mi	Replaced catalytic converter
88000 mi	Snub motor mount was bent and replaced during scheduled timing belt change at roughly 87500 miles.

137000 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
164000 mi	Valve cover gaskets leaking. Second time. They were replaced in 2010.

67000 mi US $150	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.
106600 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 :)
112500 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 $300	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 $180	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.
146400 mi	Stalling again, but this time could find nothing wrong and problem is gone again.
179000 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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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

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

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

95000 mi

US $1800

Replace timing belt Repair broken glove box

187000 mi

Engine light on for catalytic converter. Ran fine, though.

135000 mi

US $150

Oil pressure light would come on intermittently. Replaced the sending unit and oil filter.

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.

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.

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).
165000 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.
195000 mi US $400	Replace radiator, oil change, replace snub mount.

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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.

75000 mi

US $2800

Had to replace one of the overhead cams which the dealer said was a common repair for this car

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.

136900 mi

US $600

Replaced all engine mounts.

94000 mi

US $5500

Catalytic Converters (L & R)

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
64000 mi	leaking cam seals, collapsed valve tappet

202000 mi

US $76

Fuel pump failed and was replaced

186000 mi US $160	Oxygen sensor bank 1 has to be replaced.
187000 mi US $40	coolant sensor had to be replaced.
210000 mi US $738	serpentine belt tensioner and serpentine belt was replaced.
218000 mi US $263	After having the CEL on for many years, crankcase vent valve got replaced. The CEL went off for a day then came back on again. When scanned, it showed code P0441 (evaporative emission system/ incorrect purge flow).
238000 mi US $720	the water pump did fail ,though was replaced back in February, and had to be replaced. Also, after getting the anti-freeze fluid every where the power steering pump did fail also and was replaced.
250000 mi US $614	the dual radiator fans were making loud noise and had to be replaced. Got used ones for $120. Leaking valve cover gaskets had to be replaced. misfire in cylinder 6. a coilpack had to be replaced.
262 mi US $152	misfire in cylinder 1, Delphi coil replaced by old Audi one. Also, discovered the valve cover gaskets were leaking.
263998 mi US $140	Valve cover gasket at the passenger's side was replaced ($ 50 for the part).
270990 mi US $460	Box flex pipes were replaced.
287899 mi	Fuel pump replaced.

110000 mi

US $20

replaced ignition coil

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 .

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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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164300 mi

€50

Fuel nozzle rubbers was replaced.

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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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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116560 mi

R 2600

water temp sensor faulty

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US $86

Replaced valve cover gasket due to oil found on ignition coil and spark plug in cylinder #2. Three of four ignition coils needed to be replaced. Sold car.

53000 mi

US $600

breather hose from the intake manifold to suction pump/breather valve cracked

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64000 mi

US $50

Coolant flange replaced.

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72000 mi

US $500

Coolant leak.

52000 mi

Coolant Sensor Malfunction

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

See TrueDelta's information for all Audi models.

2002 Audi A4 / S4 / RS4 repairs by problem area

2002 Audi A4 / S4 / RS4 engine repair cost distribution

2002 Audi S4 4dr Wagon

2002 Audi S4 4dr Wagon

2002 Audi S4 4dr Sedan

2002 Audi S4 4dr Sedan

2002 Audi A4 4dr Wagon

2002 Audi A4 4dr Wagon

2002 Audi A4 4dr Wagon

2002 Audi A4 4dr Wagon

2002 Audi A4 4dr Wagon

2002 Audi A4 4dr Sedan

2002 Audi A4 4dr Sedan

2002 Audi A4 4dr Sedan

2002 Audi A4 4dr Sedan

2002 Audi A4 4dr Sedan

2002 Audi A4 4dr Sedan

2002 Audi A4 4dr Sedan

2002 Audi A4 / S4 / RS4

2002 Audi A4 / S4 / RS4

2002 Audi A4 / S4 / RS4 4-door

2002 Audi A4 / S4 / RS4 4-door

2002 Audi A4 / S4 / RS4 4-door

2002 Audi A4 / S4 / RS4 4-door

2002 Audi A4 / S4 / RS4 4-door

2002 Audi A4 / S4 / RS4 4-door

2002 Audi A4 / S4 / RS4 4-door

2002 Audi A4 / S4 / RS4 Engine Problems