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Audi , A6 , C4 , 2.0 115 (1994-) Common Issues

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  1. Crankshaft or camshaft timing belt wear/tear
  2. Water pump failure (often accompanied by engine overheating)
  3. Head gasket leakage (caused by water pump failure or head bolt torque loss)
  4. Fuel injector clogging/fouling (reducing engine performance and fuel efficiency)
  5. Oxygen sensor failure (resulting in poor fuel economy and decreased performance)
  6. Mass Airflow Sensor (MAF) contamination/corrosion
  7. Coolant leaks from the radiator, hoses, or water pump seals
  8. Worn-out engine mounts
  9. Brake wear (rotors and pads) due to excessive heat buildup
  10. Rear differential noise/leakage (from worn-out seals or damaged bearings)
  11. Ignition coil failure (causing intermittent engine stalling)
  12. Spark plug fouling (reducing engine performance and fuel efficiency)
  13. Alternator belt wear/tear (resulting in loss of electrical power)
  14. Sunroof motor failure (due to corrosion or worn-out components)
  15. Rear axle joint wear
  16. Transmission mounts failure (resulting in unusual vibrations)
  17. Engine idle control valve (IAC) sticking/corrosion
  18. EGR valve clogging/fouling (reducing engine performance and fuel efficiency)
  19. Fuel pressure regulator leakage
  20. Airbag light illumination (often caused by faulty sensors or wiring)
  21. ABS sensor failure (resulting in erratic brake behavior)
  22. Worn-out or damaged rear wheel bearings
  23. Rear door latch malfunction
  24. Trunk release lever wear/tear (preventing trunk lid from opening properly)
  25. Side mirror adjustment mechanism failure
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