BMW 640d F12 N57 Timing Chain Stretch
BMW
5 Series
2011
N57 3.0d
⚡ Quick Summary
Severity Level
Medium
Safe to Drive?
⚠️ Drive with Caution
Safety Impact
Indirect risk — worth monitoring, not urgent
Urgency Level
🟡 Monitor Closely
The N57 in F12 640d can develop timing chain stretch at very high mileage (200,000+ km). Cold start rattle indicates chain wear. Chain kit replacement costs £1,500-2,500 on convertible due to access.
Repair / Solution
No confirmed fixes yet. Share yours below.
⚠️ Wrong Diagnosis?
No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this BMW 5 Series 2011 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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