Audi, A8, D3, 6.0 Quattro (2003-) Common Issues
1. Faulty Oxygen Sensor
Occurrence: 12%Cost to repair: $300Symptoms:
Check Engine Light on, Poor Fuel Economy, Stalling
2. Bad Fuel Pump
Occurrence: 8%Cost to repair: $1200Symptoms:
Difficulty Starting Engine, No Fuel Pressure, Check Engine Light on
3. Coolant Leak
Occurrence: 6%Cost to repair: $900Symptoms:
Green or Yellow Liquid Underneath Car, Overheating Engine, Low Coolant Level
4. Faulty Mass Airflow Sensor
Occurrence: 9%Cost to repair: $450Symptoms:
Poor Engine Performance, Check Engine Light on, Stalling
5. Bad Alternator
Occurrence: 5%Cost to repair: $800Symptoms:
Battery Drain, Electrical System Malfunction, Check Engine Light on
6. Transmission Solenoid Failure
Occurrence: 4%Cost to repair: $1000Symptoms:
Slipping or Delayed Shifting, Grinding or Whining Noises, Check Engine Light on
7. Faulty Catalytic Converter
Occurrence: 7%Cost to repair: $650Symptoms:
Slow Engine Performance, Check Engine Light on, Unusual Exhaust Sounds
8. Air Suspension Failure
Occurrence: 3%Cost to repair: $1500Symptoms:
Unlevel Ride Height, Bouncy or Sagging Ride, Check Engine Light on
9. Faulty EGR Valve
Occurrence: 2%Cost to repair: $250Symptoms:
Check Engine Light on, Poor Fuel Economy, Unusual Exhaust Sounds
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