BMW 330I 2019–2020 — technical service bulletin
Bulletin B511020 · NHTSA communication 10174014 · issued Apr 1, 2020
Technical service bulletin
communication type
Visibility
component
2019–2020
model years
5
vehicle entries
Official summary
INTERFERENCE NOISE WHEN FOLDING THE OUTSIDE MIRRORS: Interference noises (creaking groaning clicking) may be present when folding the side view mirrors in or out. Excessive friction on the pivoting mechanism of the side view mirror hinge.
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.