BMW Alpina XB7 2019–2023 — technical service bulletin
Bulletin B410123 · NHTSA communication 10233159 · issued Feb 1, 2023
Technical service bulletin
communication type
Structure
component
2019–2023
model years
8
vehicle entries
Official summary
While driving the vehicle on normal roads at 10 mph and above, a popping sound from the top of the Cpillar(s) is heard. The sound can occur on either the left or right side of the C-pillar.
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.