BMW 3 Series 2011–2012 — technical service bulletin
Bulletin SIB-64-05-13 · NHTSA communication 10052366 · issued May 1, 2013
Technical service bulletin
communication type
Electrical System
component
2011–2012
model years
5
vehicle entries
Official summary
Bmw: on some activehybrid (3,5,7), the high voltage battery is cooled by refrigerant and is regulated by expansion valve at base of battery and it can become stuck in open position, either permanently or intermittently. Models f02h, f10h, f30h. No model years listed. *pe
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.