Technical Service Bulletin B520417 — 2011 BMW 550I
SEATS
Bulletin Details
| TSB ID | B520417 |
| Manufacturer | |
| Vehicle | 2011 BMW 550I |
| Component | SEATS |
| Communication Date |
Bulletin Summary
BACKREST NOISES WHEN UNDER LOAD. Pop noise coming from seat backrest when pressure exerted toward rear or while pulling away from a stop. Friction between top right rivet holding lordosis (back Lumbar support) valve block and backrest cushion spring.
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.