BMW X3 2020 — technical service bulletin
Bulletin B120120 · NHTSA communication 10174002 · issued Apr 1, 2020
Technical service bulletin
communication type
Lane Departure
component
2020
model years
2
vehicle entries
Official summary
ENGINE: FAULTS FOR TURBOCHARGER ELECTRIC WASTEGATE STORED IN THE DME: This Service Information Bulletin (Revision 1) replaces SI B12 01 20 dated January 2020. The engine malfunction warning (MIL) is illuminated and one of the following fault codes is stored in the DME.
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.