BMW 428I 2015–2017 — technical service bulletin
Bulletin B510417 · NHTSA communication 10146543 · issued Feb 1, 2017
Technical service bulletin
communication type
Structure
component
2015–2017
model years
6
vehicle entries
Official summary
?CREAKING NOISE FROM TAILGATE DURING TRAVEL . While the vehicle is in motion, a creaking noise is heard from the vicinity of the tailgate. Friction between trim panel and the tailgate where they make contact.
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.