Rod Bearing Wear
SeriousEngineS54 and S65 cars are well known for rod-bearing wear, especially if oil changes have been stretched or the cars have seen regular track use. Left too long, the engine can destroy itself.
Most affected: E46 M3, E90/E92/E93 M3
Typical symptoms
- •Metallic knock when warm
- •Glitter in drained oil or a nervous oil-pressure history
What to inspect before you buy
- ✓Ask if bearings were replaced preventatively
- ✓Look for proof of frequent high-quality oil services