BMW 330E 2019–2021 — technical service bulletin
Bulletin B650221 · NHTSA communication 10187482 · issued Jan 1, 2021
Technical service bulletin
communication type
Electrical System
component
2019–2021
model years
14
vehicle entries
Official summary
FALSE ALARM ACTIVATION TRIGGERED BY INTERIOR ULTRASOUND SENSOR: The DWA (anti-theft alarm) triggers for no apparent reason with all the vehicle's doors and windows closed.
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.