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Service bulletin B650426

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 id11030310
Published by NHTSA2026-03-30
Manufacturer's numberB650426
Manufacturer's date2026-03-16
NHTSA componentUNKNOWN OR OTHER

NHTSA's summary

Customers may report issues with the alarm system not functioning correctly. These concerns may includeone or more of the following: Missing confirmation sound (function cannot be selected or deselected in the Central InformationDisplay (CID) menu). Alarm system deactivated (interior mirror light off). Alarm does not function. DWA LED without function after locking (no flashing/flashing). Acoustic acknowledgement is unavailable or cannot be enabled/disabled via the CID menu underdoors/windows. Tilt alarm sensor “SINE” cannot be reached via diagnostics.

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.

Vehicles listed
BMW 430I2025
BMW 840I2025
BMW Z4 M40I2025

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