BMW 3 Series 2013–2015 — technical service bulletin
Bulletin B-123314 · NHTSA communication 10058490 · issued Mar 1, 2015
Technical service bulletin
communication type
Engine and Engine Cooling
component
2013–2015
model years
3
vehicle entries
Official summary
During the dme's time limits engine coolant does not reach operating temperature cause by faulty thermostat inside transmission *cn
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.