N47 timing chain failure - prevention guide
The N47 timing chain issue is well documented but heres a prevention guide:
- Listen for chain rattle on cold start (early warning sign)
- Change oil every 10k km max (not BMWs 30k recommendation)
- Use quality oil (Castrol Edge or Liqui Moly)
- Dont ignore any unusual engine noises
- If you hear rattle, get it fixed IMMEDIATELY
Replacement cost: 1500-2500 EUR depending on damage
If the chain snaps: engine replacement (5000+ EUR)
The chain runs at the back of the engine (bad design by BMW) which makes it expensive to replace. But its cheaper than a new engine.
