BMW 428I 2014–2016 — technical service bulletin
Bulletin B520215 · NHTSA communication 10147203 · issued Jul 1, 2015
Technical service bulletin
communication type
Seats
component
2014–2016
model years
6
vehicle entries
Official summary
Service Action: Replace Both Front Seat Headrests. The customer may hear rattling noises coming from the front headrest while driving.
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.