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SIB 51 09 21: Convertible top noise
Convertible top noise on BMW F22/F23 models (2015–2021); BMW explains the cause and the approved repair.
BMW service bulletin · NHTSA ID 10199295 · May 2021 · also written SI B51 09 21, B510921
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.
GROANING FROM THE SIDE WINDOWS: There is a groaning noise present from the area where the side windows meet the convertible top while driving. Insufficient seal pressure against the side windows.
Details
| Bulletin number | SIB 51 09 21 Also written: SI B51 09 21, B510921, 51 09 21, SIB-51-09-21, SI B510921 |
|---|---|
| NHTSA ID | 10198902, 10199295 (revisions) |
| Document IDs filed | B510921 |
| Type | Service bulletin |
| Date | |
| Models | 228i, 230i, M235i, M240i |
| Model years | 2015–2021 |
| Chassis | F22, F23 |
| Engines | B46/B48, B58, N20, N55 |
| Component (NHTSA) | Back Over Prevention Electrical System Equipment Hydraulic Service Brakes Visibility |
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.
More for these cars
All B46/B48 bulletins All B58 bulletins All N20 bulletins All N55 bulletins
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Some failures are covered by a safety recall or a warranty extension. Our free recall check lists NHTSA recalls for your car's model and year.
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.