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The N47 diesel engine (2007-2015) has a rear-mounted timing chain that stretches and fails, often catastrophically. A well-documented BMW fault. This fault code is stored when the engine control unit detects a specific fault condition. Common causes include sensor failures, wiring faults, and component wear. Always read additional fault codes before replacing parts — multiple codes together provide a clearer diagnosis. Clear the code after repair and test drive to confirm the fault does not return.
Based on 0 driver confirmations
No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this BMW problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
Chain failed at 82k miles. BMW acknowledged it as a known issue and contributed 50% toward the repair cost even though the car was 2 years out of warranty. Total repair was £1,200, BMW paid £600. Always ask the manufacturer before paying full price on known faults.
Parts replaced: Timing chain kit (partial warranty contribution)
Cold start rattle lasting 10-15 seconds. Knew about the N47 issue so acted immediately. BMW specialist confirmed chain and rear guide were worn. Engine out, full chain kit fitted. £1,100. The rear guide had shed plastic fragments — another few thousand miles and it would have catastrophically failed.
Parts replaced: Timing chain kit, guides, tensioner
Bought the car knowing about the N47 issue. Cold start rattle was there but not terrible. Had the chain done immediately — engine out job, full day's labour. £1,200 all in at an independent BMW specialist. Chain and guides were worn but not failed. Money well spent considering the alternative.
Parts replaced: Timing chain kit, guides, tensioner
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