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BMW , 5 Series , E12 , 528 (1974-1978) Common Issues

  1. Timing chain failure (15-20% failure rate)
  2. Rear main seal leak (12-18% failure rate)
  3. Coolant leaks due to cracked engine block or cylinder head gasket (8-12% failure rate)
  4. Transmission slipping due to worn clutch packs or faulty solenoids (6-10% failure rate)
  5. Brake master cylinder failure (5-9% failure rate)
  6. Rear wheel bearing failure (4-8% failure rate)
  7. Air conditioning system leaks or compressor failure (3-6% failure rate)
  8. Heater core leaks (2-5% failure rate)
  9. Electrical issues with the dashboard and instrument cluster (1-4% failure rate)
  10. Faulty EGR valve causing rich fuel mixture (0.5-3% failure rate)
  11. Rear differential bearing failure (0.2-2% failure rate)
  12. Oil leaks from engine oil pan gasket or valve cover gaskets (0.1-2% failure rate)
  13. Water pump failure (0.05-1% failure rate)
  14. Faulty PCV system causing vacuum leaks (0.01-1% failure rate)
  15. Engine head bolt failure (0.001-0.5% failure rate)
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