Technical Service Bulletin B260422 — 2021 BMW 750LI
POWER TRAIN
Bulletin Details
| TSB ID | B260422 |
| Manufacturer | |
| Vehicle | 2021 BMW 750LI |
| Component | POWER TRAIN |
| Communication Date |
Bulletin Summary
There is a howling or whistling noise from under the vehicle at 30 -37 mph (50 -60 km/h) when driving after a cold start, when the outside temperature is 32 F (0 C) or lower. The noise goes away as the vehicle/driveline reaches operating temperature.
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.