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2004 Audi A4 / S4 / RS4 Engine Problems

247 TrueDelta members own (or used to own) a 2004 Audi A4 / S4 / RS4. 93 of these members (37.7%) have reported engine repairs for their car. A total of 221 engine repairs to 2004 Audi A4 / S4 / RS4s--an average of 0.9 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 2004 Audi A4 / S4 / RS4 problems occur, check out our car reliability stats.

Percentage of 2004 Audi A4 / S4 / RS4 repairs by problem area

Chart based on 476 repairs.

2004 Audi A4 / S4 / RS4 engine repair cost distribution

Chart based on 137 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 2004 Audi A4 / S4 / RS4 repair histories. Log in or join us to see them all.

2004 Audi S4 4dr Sedan

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

39000 mi US $1200 Driver side auxiliary radiator and associated hose(s). 
37820   Replace one coil. 
42160   replace one cat 
49600 C $1500 leaking aux rads 

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2004 Audi S4 4dr Sedan

340-horsepower 4.2L V8 6-speed manual AWD

52000 mi US $350 Passenger side auxilary radiator.  
60000 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   Oil/coolant leak. 
52000 US $60 Ignition Coil went bad and was replaced by me. 
54000   Another Ignition coil went bad. Replaced in an hour by me. 
66000   My fuel pump died. Part was replaced by me. 
69000   Auxiliary radiator was leaking. Part replaced by me. 
81000   One of my O2 sensors went bad and i replaced it myself. 
21000 US $310 Mass Air Flow was replaced. 
39000   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. 

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2004 Audi A4 4dr Sedan

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

50000 mi US $1090 needed new water pump as fluid was leaking. got new timing belt too! 
51000   coolant temp thermostat replaced 
67000   Fuel pump died, pump was replaced and fuel filter was replaced 
71000   Leaking hoses to be replaced 
62000   Fuel pump died. Replaced under CPO warranty 
64000 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   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.  

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2004 Audi A4 / S4 / RS4

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. 
34720 C $300 Computer lost settings, had to be reflashed. 

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