BMW 428I 2014–2017 — technical service bulletin
Bulletin B513316 · NHTSA communication 10147023 · issued Aug 1, 2016
Technical service bulletin
communication type
Seats
component
2014–2017
model years
11
vehicle entries
Official summary
SLOSHING NOISES/WATER IN REAR PASSENGER COMPARTMENT. Water sloshing noises coming from the rear passenger compartment (left or right) while driving. Water ingress in the rear passenger compartment (rear seat bench / rear passenger compartment foot well / rear passenger compartment side panel) or luggage compartment. Failure of various control units installed in the area of the water removal channel. Poor water drainage due to dirt at the seal plug in the area of the fixed side glass/trim panel. Faulty clip on the water collecting channel. Dirt blocking the water drain to the side sill.
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.