BMW 330E 2019–2021 — technical service bulletin
Bulletin B640521 · NHTSA communication 10200245 · issued Jun 1, 2021
Technical service bulletin
communication type
Visibility
component
2019–2021
model years
6
vehicle entries
Official summary
A rattling noise is heard in the vehicle interior when the air conditioning is activated.
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.