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Audi , A6 , C4 , 2.8 Quattro (1994-) Common Issues

  1. Water pump failure (10-15% failure rate)
  2. Alternator bearing failure (5-7%)
  3. Timing belt tensioner failure (4-6%)
  4. Turbocharger oil leaks (3-5%)
  5. CV boot and joint wear (3-5%)
  6. Engine coolant leak due to faulty thermostat housing gasket (2-4%)
  7. Faulty oxygen sensor (2-3%)
  8. Transmission solenoid pack failure (1.5-3%)
  9. Rear main seal oil leaks (1-2%)
  10. Idle air control valve failure (0.5-1.5%)
  11. Fuel system clogged fuel filter (0.5-1%)
  12. EGR valve failure (0.5-1%)
  13. Brake master cylinder failure (0.3-0.6%)
  14. Power steering pump failure (0.2-0.4%)
  15. Air conditioning compressor failure (0.2-0.4%)
  16. Rear shock absorber collapse (0.1-0.3%)
  17. Front lower control arm bushing wear (0.1-0.2%)
  18. Steering rack and pinion play (0.1-0.2%)
  19. Ignition coil failure (0.05-0.1%)
  20. Engine block cracks (rare, 0.01-0.05%)
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