Technical Service Bulletin B540521 — 2017 BMW 540I
EQUIPMENT:ELECTRICAL
Bulletin Details
| TSB ID | B540521 |
| Manufacturer | |
| Vehicle | 2017 BMW 540I |
| Component | EQUIPMENT:ELECTRICAL |
| Communication Date |
Bulletin Summary
The sunroof will not operate in either direction.
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.