BMW X5 2020–2021 — technical service bulletin
Bulletin B330221 · NHTSA communication 10194295 · issued Apr 1, 2021
Technical service bulletin
communication type
Power Train
component
2020–2021
model years
4
vehicle entries
Official summary
KNOCKING NOISE FROM THE REAR AXLE OVER UNEVEN ROAD SURFACES: . Knocking noises coming from the rear axle when cornering slowly and/or traveling over uneven road surfaces.
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.