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Audi A4 / S4 / RS4 Engine Problems

2658 TrueDelta members own (or used to own) a 2000 or newer Audi A4 / S4 / RS4. 840 of these members (31.6%) have reported engine repairs for their car. A total of 1897 engine repairs to Audi A4 / S4 / RS4s--an average of 0.7 per vehicle--have been reported.

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 Audi A4 / S4 / RS4 problems occur, check out our car reliability stats.

Chart based on 4287 repairs.

Audi A4 / S4 / RS4 engine repair cost distribution

Chart based on 871 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
Non-members can see only ten Audi A4 / S4 / RS4 repair histories. Log in or join us to see them all.

2007 Audi A4 4dr Wagon

turbocharged 200hp 2.0L I4 6-speed manual AWD

5000 mi   Car had start problems in the morning. Fuel line pressure monitor had to be replaced.  

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2006 Audi A4 4dr Sedan

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

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   Fixed Issue from december. Received another check engine light, result was a misfire they replaced one of the coils. 
55800   Check engine light, boost control valve for turbo replaced 
81840   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. 

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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 Sedan

turbocharged 170hp 1.8L I4 5-speed manual FWD

50000 mi   Misfire when cold 
52000   Misfire at startup 

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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. 

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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   thermostat 

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2002 Audi A4 4dr Sedan

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

97000 mi US $1800 engine mounts replaced water pump causing coolant leak.. replaced waterpump and re-did timing belt service 
113000   Catalytic converter replaced. 
145000   Leak at turbo 

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2002 Audi A4 4dr Sedan

turbocharged 170hp 1.8L I4 5-speed manual AWD

69000 mi US $50 rough idle due to the front O2 sensor. 
69000   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   -O2 sensor once again. -spark plugs for some strange reason were red at the tips. -rough idle 

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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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2001.5 Audi A4 4dr Wagon

turbocharged 250hp 2.7L V6 6-speed manual AWD

38000 mi US $50 Valve cover gasket was bad, causing leak to occur. 
41000   Fuel gauge sender unit went bad 
44000   Broken vacuum hose 
46000   Camshaft tensioner seal leaking oil. Replaced seal. 
46000   Exhaust Gas Temperature Sensor. 
51000   Bad temperature sending unit. 
59000   Replaced auxillary water pump (sometimes called after run cooling pump) Cracked coolant tank replaced 
60000   Replaced whining fuel pump 
69000   Coolant temperature sensor bad. Replaced temperature sensor. Exhibited bad starting as source of problem. 
83000   Replaced vacuum hose assembly Replaced valve cover gasket 

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