BMW 330I 2019–2020 — technical service bulletin
Bulletin B611320 · NHTSA communication 10239608 · issued Jun 1, 2023
Technical service bulletin
communication type
Electrical System
component
2019–2020
model years
21
vehicle entries
Official summary
In the event of an accident, the two-battery Dual Storage System (DSS) is disconnected from the electrical system via an internal relay.
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.