Audi, A8, D4, 4.2 FSI Quattro (2010-2012) Common Issues
1. Rough Idling
Occurrence: 15%Cost to repair: $300Symptoms:
Difficulty starting engine or rough idling at low speeds.
2. Faulty Mass Airflow Sensor
Occurrence: 12%Cost to repair: $200Symptoms:
Poor engine performance, rough idling, or decreased fuel efficiency.
3. Faulty Oxygen Sensor
Occurrence: 11%Cost to repair: $250Symptoms:
Poor engine performance, rough idling, or decreased fuel efficiency.
4. VANOS Vibration
Occurrence: 9%Cost to repair: $400Symptoms:
Unusual vibrations felt through the steering wheel or at certain engine speeds.
5. Camshaft Position Sensor Failure
Occurrence: 8%Cost to repair: $320Symptoms:
Engine performance issues, rough idling, or difficulty starting.
6. Faulty Fuel Pressure Regulator
Occurrence: 7%Cost to repair: $420Symptoms:
Difficulty maintaining engine speed under load, decreased fuel efficiency.
7. Coolant Leak Issues
Occurrence: 6%Cost to repair: $380Symptoms:
Visible signs of leakage around the cooling system components or sudden drops in engine temperature.
8. Engine Oil Leaks
Occurrence: 5%Cost to repair: $350Symptoms:
Presence of oil leaks from various points on the engine block, gaskets, or seals.
9. Transmission Issues
Occurrence: 4%Cost to repair: $550Symptoms:
Unusual noises, vibrations, or difficulty shifting gears into specific gear ranges.
10. Audi A8 D4 Quattro Rear Differential Failure
Occurrence: 3%Cost to repair: $580Symptoms:
Loss of power to the rear wheels, unusual vibrations felt through the vehicle's body.