BMW X3 2020–2021 — technical service bulletin
Bulletin B310121 · NHTSA communication 10190848 · issued Mar 1, 2021
Technical service bulletin
communication type
Equipment
component
2020–2021
model years
4
vehicle entries
Official summary
FRONT AXLE SUPPORT WEDGE: Due to a parts list error in production, the vehicle was not built according to specification.
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.