BMW 330E 2019–2021 — technical service bulletin
Bulletin B340621 · NHTSA communication 10199294 · issued May 1, 2021
Technical service bulletin
communication type
Electronic Stability Control
component
2019–2021
model years
8
vehicle entries
Official summary
SERVICE ACTION: PROGRAM THE DYNAMIC STABILITY CONTROL (DSC) UNIT: Software in the DSC unit could cause a reduction of brake regeneration for the next 40 drive (key) cycles.
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.