Audi, A6, C4, 2.0 115 (1994-) Common Issues
1. Rust on exhaust system
Occurrence: 14%Cost to repair: $300Symptoms:
Typical signs of rust include visible orange spots, flaking paint, and holes in the exhaust pipe.
2. Faulty oxygen sensor
Occurrence: 12%Cost to repair: $250Symptoms:
Engine light on, rough engine idle, poor fuel efficiency, and decreased power output.
3. Timing chain tensioner failure
Occurrence: 10%Cost to repair: $800Symptoms:
Rattling noise from the timing cover, rough engine idle, and decreased power output.
4. Faulty automatic transmission solenoid
Occurrence: 9%Cost to repair: $600Symptoms:
Slipping or hesitation when shifting gears, unusual noises during gear changes, and decreased performance.
5. Rear brake caliper failure
Occurrence: 8%Cost to repair: $420Symptoms:
Grinding or screeching noise from the rear brakes, spongy brake pedal, and increased stopping distance.
6. Faulty fuel pressure regulator
Occurrence: 7%Cost to repair: $220Symptoms:
Rough engine idle, decreased power output, and poor fuel efficiency.
7. Water pump failure
Occurrence: 6%Cost to repair: $350Symptoms:
Overheating engine, steam from the hood, and decreased coolant level.
8. Faulty MAF (Mass Airflow) sensor
Occurrence: 5%Cost to repair: $200Symptoms:
Rough engine idle, poor fuel efficiency, and decreased power output.
9. Rear wheel bearing failure
Occurrence: 4%Cost to repair: $480Symptoms:
Grinding or growling noise from the rear wheels, vibrations during acceleration, and decreased stability.
10. Faulty EGR (Exhaust Gas Recirculation) system
Occurrence: 3%Cost to repair: $320Symptoms:
Rough engine idle, poor fuel efficiency, and decreased power output.