BMW 328D 2013–2017 — technical service bulletin
Bulletin B520117 · NHTSA communication 10146546 · issued Feb 1, 2017
Technical service bulletin
communication type
Seats
component
2013–2017
model years
20
vehicle entries
Official summary
?RATTLING/CREAKING NOISE FROM REAR BENCH SEAT BACKREST . Rear seat bench backrest makes creaking or rattling noise when driving on uneven surface. Torsional stresses on vehicle body cause movement between seat back and latching mechanism. Friction among backrest locking mechanism components generates noise.
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.