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Audi , A6 , C4 , S6 Avant 2.2 Quattro (1994-) Common Issues

  1. Oil leaks from the valve cover gasket
  2. Water pump failure (due to coolant system corrosion)
  3. Rear main seal leakage
  4. Engine oil consumption (burning oil)
  5. Power window regulator failure
  6. Central locking system malfunction
  7. ABS sensor and wheel speed sensor faults
  8. ECU software glitches and reprogramming requirements
  9. Clutch master cylinder failure
  10. Timing belt tensioner failures
  11. Brake pedal free play due to worn master cylinder or brake pads
  12. Trailing arm bush wear, causing uneven tire wear
  13. Rear differential seal leaks
  14. Fuel pressure regulator (FPR) faults and replacement requirements
  15. Engine oil level sensor faults
  16. Rear axle bearing failure
  17. Alternator belt slipping due to excessive tension
  18. Air conditioning compressor clutch engagement issues
  19. Sunroof actuator motor failure
  20. Power steering fluid leaks
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