BMW M850I 2019–2020 — technical service bulletin
Bulletin B122819 · NHTSA communication 10169457 · issued Nov 1, 2019
Technical service bulletin
communication type
Electrical System
component
2019–2020
model years
4
vehicle entries
Official summary
THE MIL MAY BE ILLUMINATED BY ERRONEOUS VALVETRONIC FAULTS. One of the following faults may be stored in the digital motor electronics (DME) either as part of diagnosing a different issue; and-or an illuminated malfunction indicator lamp (MIL).
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.