| 1 | 0 | 3 | 4 | 3 | 4 |
2004 Audi A6 / S6 / RS6 repairs by problem area
Engine (38%)
Transmission and Drivetrain (20%)
Brakes and Traction Control (0%)
Suspension and Steering (16%)
Electrical and Air Conditioning (16%)
Paint, Rust, Leaks, Rattles, and Trim (3%)
Other (7%)
Chart based on 128 repairs.
2004 Audi A6 / S6 / RS6 engine repair cost distribution
$2500+ (9%)
$1000 - $2499 (9%)
$500 - $999 (16%)
$100 - $499 (27%)
< $100 (39%)
Chart based on 44 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
2004 Audi A6 / S6 / RS6
Engine not specified
| 56000 mi | Extensive replacement of gaskets on the engine, seal at the input shaft of the transmission replaced, repairs made to cure excessive oil burning noted by owner. |
| 155000 mi C $2500 |
Two Catalytic converters replaced plus rewriting for O2 sensors. |
2004 Audi A6 / S6 / RS6 4dr Wagon
220-horsepower 3.0L V6 5-speed shiftable automatic AWD
| 500 mi | replace gas cap and evaporative purge canister after check engine light comes on, 2 separate incidents, both repaired correctly |
| 74000 mi US $3000 |
Replaced catalytic converters, removed ones were fracturing. I was shown the fractures, car is 11 years old. |
| 102000 mi US $125 |
Check engine light. Computer reported engine running too lean. Problem caused by vacuum leak. Repair required new gasket. |
| 123000 mi US $125 |
Lower radiator (original, 13+ years old) hose looked a bit crusty |
| 128000 mi US $1110 |
Drive belt tensioner failed. (original part 13.5 years old) |
| 128000 mi US $900 |
One of two original (13.5 year old) flex-pipe failed. Replace both. |
| 98700 mi | Coolant leaking from water pump; replaced water pump seal. |
| 106300 mi US $325 |
Car had pronounced exhaust leak. Diagnosed both flex pipes as rusty and disintegrating. Replaced both flex pipes. |
| 108000 mi US $400 |
Car was leaking oil. Replaced 3 cam adjuster gears to remedy the leak. Car had broken engine mount. |
2004 Audi A6 / S6 / RS6 4dr Sedan
300-horsepower 4.2L V8 5-speed shiftable automatic AWD
| 86000 mi | secondary air pump and combination valve |
| 96700 mi US $250 |
Combi valve |
| 87000 mi US $30 |
replaced the temperature control module - temperature gauge in dash not working, $30 part, 30 minute repair done by me in my garage |
| 61000 mi | 2. Valve cover gasket needed to be replaced |
2004 Audi A6 / S6 / RS6 4dr Sedan
265-horsepower 2.7L V6 6-speed manual AWD
| 49000 mi | Secondary Air Pump |
| 50000 mi US $620 |
Secondary Air Code Both Banks, P0491. Vacuum broken under intake manifold at plastic T. Disassemble back of intake to repair. |
| 54000 mi US $40 |
Coolant temperature sensor faulty. |
2004 Audi A6 / S6 / RS6 4dr Sedan
265-horsepower 2.7L V6 5-speed shiftable automatic AWD
| 102000 mi US $600 |
Fuel pump failed and had to be replacd |
| 102200 mi US $450 |
Had to get Radiator replaced |
| 104000 mi US $600 |
Oil Leaking, Gasket had to be replaced |
| 125000 mi US $1500 |
Engine Oil leak |
| 97000 mi US $270 |
Hard start |
| 170000 mi US $623 |
Original fuel pump and fuel filter was replaced. Car would have problems starting after engine was warm. Actually in April. |
| 179000 mi US $300 |
Replaced original aux coolant pump that is located under manifold. |
| 100000 mi | Coil pack failed, threw CEL. Car driveable, but just barely - limped to dealership for repair |
| 107000 mi US $40 |
Coil pack failed. |
| 57495 mi US $54 |
Cam adjustment and valve cover seals. CAM ADJ & VALVE COVER SEALS |
| 95200 mi US $1500 |
Valve cover gaskets were leaking. Both were replaced along with the Chain Tensioner Gaskets, and Cam Caps. Since the top-end of the engine was opened, the Spider Crankcase Breather Hose Assembly was also replaced. During cooling system inspection, it was discovered the coolant overflow tank (plastic) was beginning to crack. Tank was replaced. |
| 99300 mi US $100 |
Coolant Temp Sensor in cylinder head replaced. Recommended by mechanic, don't know why. |
| 45000 mi | turbo cooling pump |
| 48000 mi US $85 |
Check engine light on, noticed no difference in driving the car. Computer reported standard systems check as "OK". Scheduled an appointment with dealer, who claimed a problem with the engine exhaust valves. Valves replaced under CPO warranty. |
| 55000 mi US $92 |
CEL from reported intermittent evap leak. Dealer unable to find any issue, cleared code. |
| 60200 mi US $180 |
Engine heat sensor failed causing CEL. Bad wiring harness led to starting problems and one stall immediately after starting. Dealer replaced sensor and harness. |
| 135000 mi US $5000 |
Replaced Turbos. |
| 125000 mi US $120 |
New coolant reservoir |
| 134837 mi US $204 |
original cam position sensors failed causing CEL and fault code. replaced both banks with OEM sensors, original coolant temp sensor failed causing fault code and CEL. replaced with OEM part |
| 138000 mi US $2100 |
slight water coolant leak likely due to failed thermostat housing. T belt was less than 20k miles old. replaced all of the original hoses with OEM parts |
2004 Audi A6 / S6 / RS6 4dr Sedan
220-horsepower 3.0L V6 6-speed shiftable CVT FWD
| 39000 mi | Emission control module in CVT transmission replaced under 7 year 70,000 mile Emission warranty. |
| 42000 mi US $713 |
Broken front motor mount. Completely separated. Replaced both front motor mounts. |
| 57200 mi US $2300 |
Coolant sensor leak/coolant migration to ECM All replaced |
2004 Audi A6 / S6 / RS6 4dr Sedan
220-horsepower 3.0L V6 5-speed shiftable automatic AWD
| 45000 mi | Engine light was flashing. Timing belt was found to be cracked. |
| 94000 mi US $300 |
Flex pipes between Catalytic converter & exhaust needed replacement. |
| 68000 mi US $60 |
My engine was misfiring, so I had it towed and all it needed was a new coil. |
| 174400 mi US $2500 |
the exhaust system had to be replaced |
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