BMW 3 Series E36 — Reliability
Reliability Summary
Engine
M51 — 69/100
ACCEPTABLE
Known Issues
6
Engine in this model
Known Issues Across All Engines
| Issue | Engine | Severity |
|---|---|---|
| Cylinder head cracking after overheating | M51 | high |
| Injection pump leaks or electronic faults (hot and cold start problems) | M51 | high |
| Timing chain stretch | M51 | moderate |
| Water pump failure (plastic impeller) | M51 | moderate |
| Turbocharger wear at high mileage | M51 | moderate |
| Oil leaks (sump, oil filter housing, oil lines) | M51 | minor |