BMW 5 Series 2011–2012 — technical service bulletin
Bulletin SIB-11-23-14 · NHTSA communication 10057339 · issued Mar 1, 2015
Technical service bulletin
communication type
Engine
component
2011–2012
model years
2
vehicle entries
Official summary
Bmw: electrical contacts for circuit heater in thermostat can develop moisture and corrosion causing service engine soon light to illuminate. *pe updated 9/25/15. *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.