BMW E87 1 Series N45 N46 Timing Chain Guide Failure
BMW
1 Series
2004
N45/N46 1.6/2.0 Petrol
⚡ Quick Summary
Severity Level
Medium
Safe to Drive?
✅ Safe to Drive
Safety Impact
No direct safety impact reported by owners
Urgency Level
🟡 Monitor Closely
The N45/N46 petrol engines in E87 1 Series develop timing chain guide wear at high mileage. Guide fragments can enter the engine if not addressed. Chain kit replacement costs £600-1,000.
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 1 Series 2004 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
🚗 More About This Vehicle
Explore more BMW models
📖 Related Repair Guides
Help other owners by sharing your experience.
Your real-world fix helps thousands of drivers worldwide. Takes 2 minutes.