BMW 330E 2019–2021 — technical service bulletin
Bulletin B611620 · NHTSA communication 10179006 · issued Jul 1, 2020
Technical service bulletin
communication type
Equipment
component
2019–2021
model years
4
vehicle entries
Official summary
SERVICE ACTION - REWORKING THE HIGH-VOLTAGE SYSTEM CONNECTOR: The sealing plugs (aka sealing grommets) on the low-voltage connector to the high-voltage battery were incorrectly mounted. The white-colored plugs seal off the individual wire chambers in the connector.
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.