BMW i3 2014–2017 — technical service bulletin
Bulletin B612016 · NHTSA communication 10146841 · issued Sep 1, 2016
Technical service bulletin
communication type
Electrical System
component
2014–2017
model years
4
vehicle entries
Official summary
POWER LOSS AT VERY LOW SOC OF HV BATTERY. The vehicle may exhibit any of the following at very low State of Charge (SOC) - less than 8%: Power loss while running range extender (REx). Inconsistent performance of the Rex. High voltage system shutdown in vehicles without REx. Excessively high range displayed in instrument cluster. The following fault codes may be stored in the battery management electronics (SME): 21F13D - High-voltage battery, switch contactors: Switch-off after a fault 21F241 - High-voltage battery, cell supervision circuit 1: Undervoltage (at least one cell) 21F242 - High-vol
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.