BMW X5 2014–2017 — technical service bulletin
Bulletin B611916 · NHTSA communication 10146840 · issued Sep 1, 2016
Technical service bulletin
communication type
Electrical System
component
2014–2017
model years
4
vehicle entries
Official summary
SERVICE ENGINE SOON (MIL) - SME FC 21F20D. Malfunction Indicator Lamp (MIL) is illuminated. The following codes may be stored in the fault memory of the battery management electronics (SME). 21F20D - SME, safety concept: Switch-off of switch contactors by safety circuit 21F1F6 - High-voltage battery, switch contactors: Switch-off after a fault Software bug: erroneous fault code stored in SME.
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.