BMW 320I 2012–2015 — technical service bulletin
Bulletin 630814 · NHTSA communication 10147925 · issued Mar 1, 2014
Technical service bulletin
communication type
Exterior Lighting
component
2012–2015
model years
20
vehicle entries
Official summary
Active Headlight Control Malfunction in Both Headlights. AHL (Active Headlight Control) malfunctions on both sides. Both lights aim either up or down while driving. CAUSE Broken mounting bolt holding on the rear height sensor bracket
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.