Technical Service Bulletin SIB 61 01 21 — 2021 BMW M550I
ELECTRICAL SYSTEM
Bulletin Details
| TSB ID | SIB 61 01 21 |
| Manufacturer | |
| Vehicle | 2021 BMW M550I |
| Component | ELECTRICAL SYSTEM |
| Communication Date |
Bulletin Summary
48 V battery may become totally discharged, and possible replacement needed if: a) The vehicle has been charged using a 12 V charger with the hood closed during a long stationary period, the. For example, the showroom or storage. b) Vehicles stored for an extended period connected to a low output solar or trickle charger. c) Vehicles stored for an extended period with no charger connected and not properly maintained 12 V battery.
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.