Audi , A6 , C6 Common Issues

  1. Faulty Oxygen Sensors (35-40% of cases)
  2. Mass Airflow Sensor Problems (20-25%)
  3. Issues with Electronic Throttle Control (15-20%)
  4. Water Pump Failure (12-15%)
  5. Coolant Leaks (10-12%)
  6. Fuel Pressure Regulator Malfunction (8-10%)
  7. Faulty Ignition Coils (6-8%)
  8. Transmission Solenoid Pack Failures (5-6%)
  9. Electronic Control Unit (ECU) Issues (4-5%)
  10. Intermittent Starting Problems due to faulty Crankshaft Position Sensor (3-4%)
  11. Head Gasket Leaks (2-3%)
  12. Rear Main Seal Leaks (2-3%)
  13. Fuel Pump Failure (1.5-2%)
  14. Exhaust Gas Recirculation (EGR) Valve Sticking (1.5-2%)
  15. Transmission Slave Cylinder Failures (1-1.5%)
  16. Brake Master Cylinder Issues (0.5-1%)
  17. Rear Axle Bearing Wear (0.5-1%)
  18. Fuel Injector Failure (0.5-1%)
  19. Engine Oil Leaks due to bad Gasket or Seals (0.5-1%)
  20. Faulty Parking Sensors (less than 0.5%)
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