Audi, A6, C6, 3.2 FSI V6 (2004-) Common Issues
1. Rough Idling
Occurrence: 20%Cost to repair: $350Symptoms:
Poor engine performance, stalling or hesitation when starting from a standstill
2. VANOS (Variable Nockenwellensatz) Oil Leaks
Occurrence: 18%Cost to repair: $420Symptoms:
Blue smoke coming out of the tailpipe, strong oil smell
3. Mass Airflow Sensor Failure
Occurrence: 15%Cost to repair: $150Symptoms:
Rough idling, poor engine performance, check engine light on
4. Faulty Oxygen Sensor
Occurrence: 12%Cost to repair: $120Symptoms:
Poor engine performance, decreased fuel efficiency, check engine light on
5. VVT (Variable Valve Timing) Solenoid Failure
Occurrence: 10%Cost to repair: $300Symptoms:
Rough idling, poor engine performance, rattling noise from the timing chain area
6. Fuel System Pressure Sensor Fault
Occurrence: 9%Cost to repair: $180Symptoms:
Poor fuel efficiency, decreased power output, check engine light on
7. Crankshaft or Camshaft Position Sensor Issues
Occurrence: 8%Cost to repair: $220Symptoms:
Check engine light on, poor engine performance, rough idling
8. Ignition Coil Pack Failure
Occurrence: 7%Cost to repair: $200Symptoms:
Poor engine performance, decreased power output, rough idling
9. Faulty Fuel Injectors
Occurrence: 6%Cost to repair: $320Symptoms:
Poor fuel efficiency, decreased power output, check engine light on
10. Coolant Leaks and Temperature Control Issues
Occurrence: 5%Cost to repair: $250Symptoms:
Overheating or excessive cooling system pressure, blue or green fluid leaks
11. Rear Axle Shaft Seal Failure
Occurrence: 4%Cost to repair: $380Symptoms:
Play in the rear wheels, clunking noise from the differential area
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