BMW i3 2014–2020 — technical service bulletin
Bulletin B640120 · NHTSA communication 10174028 · issued Apr 1, 2020
Technical service bulletin
communication type
Back Over Prevention
component
2014–2020
model years
7
vehicle entries
Official summary
AIR CONDITIONING DOES NOT COOL: The air conditioning no longer cools the vehicle. A vehicle test reveals one or both of the following faults stored in the IHX_I1 Control Module: 801295 - Heat Pump pressure-temperature sensor 2 after air condition compressor: pressure short to ground / open circuit 80112A - Heat Pump pressure-temperature sensor 2 after air condition compressor: temperature - short to ground A short circuit at the temperature sensor due to aluminum particles in the high-pressure line.
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.