BMW 320I 2012–2015 — technical service bulletin
Bulletin 612614 · NHTSA communication 10149371 · issued Oct 1, 2014
Technical service bulletin
communication type
Electrical System
component
2012–2015
model years
20
vehicle entries
Official summary
Horn(s) Fail to Work. While trying to activate the horn, one or both horns fail to work. One or more of the following fault codes can be stored in the FEM: "8044A3 - Wiring, horn short circuit to earth" "8044A4 - Wiring, horn short circuit to positive" "8044A5 - Wiring, horn relay is defective or short circuit to positive" Water has entered the horn and caused it to fail internally (shorted out).
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.