Technical Service Bulletin B640422 — 2021 BMW M440I
VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
Bulletin Details
| TSB ID | B640422 |
| Manufacturer | |
| Vehicle | 2021 BMW M440I |
| Component | VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM |
| Communication Date |
Bulletin Summary
An interference noise (groaning noise) can be heard from within the heating and air-conditioning unit in the center of the instrument panel.
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.