Technical Service Bulletin B521125 — 2024 BMW 840I
ELECTRICAL SYSTEM
Bulletin Details
| TSB ID | B521125 |
| Manufacturer | |
| Vehicle | 2024 BMW 840I |
| Component | ELECTRICAL SYSTEM |
| Communication Date |
Bulletin Summary
If the seat ventilation is deactivated via the switch or due to parking the vehicle, the fans in the seat cushionor under the seat cushion surface are unpleasantly loud. The fans speed up loudly twice and then turn off. The functionality of the fans is not impaired. This behavior only occurs after the vehicle had been programmed to I level S18A- 25-07-520 and higher; upto, but not including S18A- 25-07-551.
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.
Other TSBs for the 2024 BMW 840I
B060425
SEATS