BMW M850I 2019 — technical service bulletin
Bulletin B650919 · NHTSA communication 10159144 · issued Mar 1, 2019
Technical service bulletin
communication type
Electrical System
component
2019
model years
2
vehicle entries
Official summary
HU-H3 MGU HEAD UNIT RESETS WITH FAULT CODE B7F8F9 RESET WATCHDOG. Customer states the following about their vehicle: * Active radio or music source is interrupted * The navigation is no longer available * A black screen is shown in the Control Display * The system works again after a short interruption Software error in the Head Unit High (HU-H3) MGU (Media Graphics Unit).
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.