WenmarOpen by Wenmar Pro

Service bulletin B540125

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11020929
Published by NHTSA2025-07-28
Manufacturer's numberB540125
Manufacturer's date2025-07-17
NHTSA componentSTRUCTURE:BODY

NHTSA's summary

When the vehicle is parked in the sun for longperiod of time, the convertible top will notopen. Note: While pressing and holding down the top’s actuation button for a normal top opening cycle- The side windows open The rear bow folds upwards The convertible top unlocks at the front bow The convertible top compartment lid moves backwards but the convertible top does not open. If the convertible top is pushed upward by hand in the A-pillar area, the convertible top opens.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Body and frame

Vehicles listed
BMW 8 SERIES2023

Listing a model year does not mean every vehicle of it is concerned: the document says which.