BMW 330E 2020–2023 — technical service bulletin
Bulletin B640921 · NHTSA communication 10225122 · issued Sep 1, 2022
Technical service bulletin
communication type
Engine and Engine Cooling
component
2020–2023
model years
15
vehicle entries
Official summary
On these Plug-in Hybrid Electric Vehicles (PHEV), the air conditioning cycles from cold to warm air while driving or while at a standstill. A rattling noise may also be heard coming from the electrical coolant condenser (EKMV).
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.