BMW X3 2018–2021 — technical service bulletin
Bulletin B630521 · NHTSA communication 10194309 · issued Apr 1, 2021
Technical service bulletin
communication type
Electrical System
component
2018–2021
model years
7
vehicle entries
Official summary
AMBIENT LIGHT TUBE COLOR DIFFERENCES: The intensity or light throughout the door panel lighting strips is not consistent. Some spots are brighter than others.
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.