BMW 428I 2014 — technical service bulletin
Bulletin SIB612817 · NHTSA communication 10215017 · issued Jun 1, 2017
Technical service bulletin
communication type
Power Train
component
2014
model years
1
vehicle entries
Official summary
SME FAULT CODE 21F04B - One or several of the following check control messages (CCM) may be displayed: Engine fault! Power loss" Powertrain malfunction, Hybrid system malfunctioning.
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.