
Audi, A8, D5 Common Issues
1. Faulty Mass Airflow Sensor
Occurrence: 12%Cost to repair: $300Symptoms:
Rough idling, decreased performance
2. P0118 Code - Intake Air Temperature Circuit Range/Logic Problem
Occurrence: 9%Cost to repair: $200Symptoms:
Check Engine light on, rough engine operation
3. Faulty Oxygen Sensor
Occurrence: 8%Cost to repair: $400Symptoms:
Rough idling, decreased fuel efficiency
4. Transmission Problems - 8-Speed Tiptronic
Occurrence: 7%Cost to repair: $1000Symptoms:
Slipping gears, hesitation when shifting
5. Faulty Electronic Throttle Control Module (ETCM)
Occurrence: 6%Cost to repair: $800Symptoms:
Rough idling, decreased engine performance
6. P0131 Code - O2 Sensor Circuit Slow Response Problem
Occurrence: 5%Cost to repair: $150Symptoms:
Check Engine light on, reduced fuel efficiency
7. Faulty Brake Master Cylinder
Occurrence: 4%Cost to repair: $600Symptoms:
Soft or spongy brake pedal, decreased braking performance
8. Rear Air Suspension Failure
Occurrence: 3%Cost to repair: $500Symptoms:
Drooping rear end, uneven tire wear
9. Faulty Park Assist Sensors
Occurrence: 2%Cost to repair: $200Symptoms:
Intermittent park assist system failure
10. Fuel Pump Failure
Occurrence: 1%Cost to repair: $1200Symptoms:
Loss of fuel pressure, decreased engine performance
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