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Service bulletin B540521

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 id10242698
Published by NHTSA2023-09-25
Manufacturer's numberB540521
Manufacturer's date2023-08-01
NHTSA componentSTRUCTURE:BODY:ROOF AND PILLARS; VISIBILITY:SUN/MOON ROOF ASSEMBLY

NHTSA's summary

?The sunroof will not operate in either direction.

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, Glass, wipers and mirrors, Sunroof

Vehicles listed
BMW 530E2018, 2019, 2020, 2021, 2022
BMW 530I2017, 2018, 2019, 2020, 2021, 2022
BMW 540D2018, 2019
BMW 540D2020
BMW 540I2017, 2018, 2019, 2020, 2021, 2022, 2023
BMW 740E2017, 2018, 2019
BMW 740I2017, 2018, 2019, 2020, 2021
BMW 740I2022
BMW 740LI2016 to 2017
BMW 745E2020, 2021
BMW 745E2022
BMW 750I2018, 2019
BMW 750LI2016 to 2021
BMW 750LI2022
BMW 840I2020, 2021, 2022, 2023
BMW ALPINA XB72021 to 2022
BMW B7 ALPINA2018 to 2020
BMW M52018, 2019, 2020, 2021, 2022, 2023
BMW M550I2017
BMW M550I2018, 2019, 2020, 2021, 2022
BMW M760I2017, 2018, 2019, 2020, 2021
BMW M760I2022
BMW M760LI2021
BMW M760LI2022
BMW M850I2020, 2021, 2022

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

Other bulletins for the same vehicles and component
B5405212023-01-03. Service bulletin. The sunroof will not operate in either direction. There are NO faults stored related to the sunroof. If the vehicle has any faults stored related to the sunroof, this bulletin does not apply.
B5401222022-05-16. Service bulletin. When locking the vehicle using the remote, the rear roof sunblind closes. It will re-open when unlocking the vehicle.
B5401212021-05-24. Service bulletin. SUNROOF REVERSES WHEN CLOSING: After the vehicle is left in the hot sun and/or high temperatures with the sunroof in the vented position, the sunroof may reverse (anti-trap activates) when closing.
B5403192019-05-20. Service bulletin. GROANING NOISE FROM SUNROOF . A groaning noise is present from the area between the front and rear sunroof glass panels only with the sunroof completely closed. Venting the front sunroof glass causes the noise to stop. The front sunroof glass is rubbing against the rubber seal of the rear sunroof glass.
B5403192019-05-20. Service bulletin. GROANING NOISE FROM SUNROOF . A groaning noise is present from the area between the front and rear sunroof glass panels only with the sunroof completely closed. Venting the front sunroof glass causes the noise to stop. The front sunroof glass is rubbing against the rubber seal of the rear sunroof glass.
B5407182019-03-18. Service bulletin. PANORAMIC SUNROOF DOES NOT OPEN OR CLOSE. The panoramic sunroof will not open or close. The sunroof may only tilt with no other functions available. There are no faults stored for the panoramic sunroof. A software error in the Roof Function Center (FZD).
B5407182019-02-25. Service bulletin. PANORAMIC SUNROOF DOES NOT OPEN OR CLOSE. The panoramic sunroof will not open or close. The sunroof may only tilt with no other functions available. There are no faults stored for the panoramic sunroof. A software error in the Roof Function Center (FZD).
B5401172018-11-05. Service bulletin. ?GLASS ROOF NOT CLOSING . Glass roof will not close. At least one of the following fault codes is stored: 30215: Slide/tilt sunroof: invalid characteristic curve, no standardization exists 30295: Electric sliding headliner: invalid characteristic curve, no standardization exists 302A0: Electric sliding headliner: System not standardized 30220: Slide/tilt sunroof: System not standardized Roof function center software.