Technical Service Bulletin M520113 — 2014 BMW 640I
SEATS
Bulletin Details
| TSB ID | M520113 |
| Manufacturer | |
| Vehicle | 2014 BMW 640I |
| Component | SEATS |
| Communication Date |
Bulletin Summary
Front Seat Lumbar Support Not Working. The lumbar support does not function properly or at all for one or both front seats. CAUSE In most cases, the lumbar knob will rotate with limited or no movement of the lumbar support; this is due to a fractured or broken lumbar support.
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.