BMW X5 2019–2021 — technical service bulletin
Bulletin B520921 · NHTSA communication 10203339 · issued Sep 1, 2021
Technical service bulletin
communication type
Seats
component
2019–2021
model years
8
vehicle entries
Official summary
Noise is heard from the seat frame/rail assembly when activating the seat motors.
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.