BMW 330E 2019–2021 — technical service bulletin
Bulletin B512620 · NHTSA communication 10182614 · issued Oct 1, 2020
Technical service bulletin
communication type
Visibility
component
2019–2021
model years
6
vehicle entries
Official summary
SERVICE ACTION - CHECK REAR WINDOW: The rear window may not have been properly bonded. The rear window may not have been properly bonded to the body during production.
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.