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NHTSA 10039764: Alternator noise
Alternator noise on BMW E65/E66/E71/F01 and other models (2007–2011); BMW explains the cause and the approved repair.
BMW service bulletin · NHTSA ID 10039764 · Jun 2011
What it covers
A service bulletin tells BMW technicians how to diagnose or fix a known issue. It is not a recall: a repair under a bulletin is normally paid by the owner unless the car is still under warranty or a warranty extension applies.
A noise is heard from the engine while running. The alternator drive belt tensioner is loose and/or shows wear.
Details
| Bulletin number | NHTSA 10039764 |
|---|---|
| NHTSA ID | 10039764 |
| Document IDs filed | SB-11-04-11 |
| Type | Service bulletin |
| Date | |
| Models | 7 Series, 7 Series, X6 |
| Model years | 2007–2011 |
| Chassis | E65, E66, E71, F01, F02 |
| Engines | N54, N55, N62, N63 |
| Component (NHTSA) | Engine And Engine Cooling › Engine › Gasoline › Belts And Associated Pulleys |
Model, year and engine coverage comes from NHTSA's records. Not every car in this range is affected; the official document lists the exact production dates and conditions.
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Source: NHTSA Manufacturer Communications (public data). BimmerBench is not affiliated with BMW or NHTSA. The title and description above are our own plain-English summary; the full bulletin is BMW's document, linked above.