BMW 540I 2019–2020 — technical service bulletin
Bulletin B660923 · NHTSA communication 11009427 · issued Oct 23, 2024
Technical service bulletin
communication type
Steering
component
2019–2020
model years
4
vehicle entries
Official summary
The customer states that one or more of the following situations may occur: 1. The availability of the Steering and Lane Control Assistant is deteriorating, and/or that the function allows thevehicle to move from side to side within the lane markings. 2. The parking space detection is less effective or hardly ever receives any parking space recommendations fromthe PMA.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.