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Audi , A8 , D3 , 4.0 TDI Quattro (2004-) Common Issues

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  1. Oil leaks from the valve cover gasket
  2. Coolant leaks from the radiator and hoses
  3. Faulty oxygen sensor (O2 sensor)
  4. Transmission solenoid problems
  5. Rear main seal oil leak
  6. Water pump failure
  7. Battery drain due to faulty computer module or BCM
  8. Rear wheel bearing failure
  9. Front wheel bearing wear
  10. Timing chain tensioner noise and potential failure
  11. Air suspension compressor issues
  12. Faulty fuel pressure sensor
  13. EGR valve clogging
  14. PCV system problems (PCV valve, hoses, and lines)
  15. Engine mounts failure
  16. Spark plug wire wear and replacement
  17. Ignition coil pack failure
  18. Fuel filter plugging
  19. Head gasket leakage (especially after overheating)
  20. Camshaft and/or bearing failure in extreme cases
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