BMW 330E 2018–2021 — technical service bulletin
Bulletin B540819 · NHTSA communication 10188947 · issued Feb 1, 2021
Technical service bulletin
communication type
Visibility
component
2018–2021
model years
9
vehicle entries
Official summary
SUNROOF REVERSES WHEN CLOSING: The sunroof reverses direction (anti-traps) just as the sunroof glass meets the wind deflector. The sunroof may not properly initialize as a result.
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.