BMW 330E 2019–2022 — technical service bulletin
Bulletin B121021 · NHTSA communication 10228426 · issued Nov 1, 2022
Technical service bulletin
communication type
Power Train
component
2019–2022
model years
8
vehicle entries
Official summary
Due to an unfavorable operating point, primarily in the low-end torque range, an incorrect detection of amixture that is too rich could happen.
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.