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SIB 54 02 21: Check control message "roof not locked
Check control message "roof not locked on BMW G29 models (2019–2021); BMW gives an inspection and repair procedure.
BMW service bulletin · NHTSA ID 10194304 · Apr 2021 · also written SI B54 02 21, B540221
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.
CHECK CONTROL MESSAGE "ROOF NOT LOCKED": A check control message is displayed stating "Roof not locked", although the roof is securely locked.
Details
| Bulletin number | SIB 54 02 21 Also written: SI B54 02 21, B540221, 54 02 21, SIB-54-02-21, SI B540221 |
|---|---|
| NHTSA ID | 10194304 |
| Document IDs filed | B540221 |
| Type | Service bulletin |
| Date | |
| Models | Z4 |
| Model years | 2019–2021 |
| Chassis | G29 |
| Engines | B46/B48, B58 |
| Component (NHTSA) | Electrical System › Software Visibility › Sun/Moon Roof Assembly |
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.