BMW 428I 2014 — technical service bulletin
Bulletin 630614 · NHTSA communication 10147978 · issued Feb 1, 2014
Technical service bulletin
communication type
Equipment
component
2014
model years
3
vehicle entries
Official summary
One or Both Headlights Are Aimed Downwards. The customer may experience one or more of the following complaints: * One or both headlights are aimed significantly too low (jammed lower limit). * No reference run is visible on the affected headlight when the ignition is turned on and the light switch is in the auto position. * No CCM (Check Control Message) is displayed when a headlight is faulty. CAUSE * TMS-3 (Headlight driver module AHL) coding error * Defective mechanism inside the headlight
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.