Technical Service Bulletin B520621 — 2020 BMW 640I
EQUIPMENT ADAPTIVE/MOBILITY
Bulletin Details
| TSB ID | B520621 |
| Manufacturer | |
| Vehicle | 2020 BMW 640I |
| Component | EQUIPMENT ADAPTIVE/MOBILITY |
| Communication Date |
Bulletin Summary
The driver's seat and/or passenger seat rattles ("cracking" noise) during load reversal. There is a slight movement in the seat that is most noticeable when moving forwards and backwards.
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.