BMW 428I 2014–2018 — technical service bulletin
Bulletin B652119 · NHTSA communication 10169473 · issued Nov 1, 2019
Technical service bulletin
communication type
Equipment
component
2014–2018
model years
14
vehicle entries
Official summary
AUDIO PLAYBACK NOT POSSIBLE: No audio heard inside the vehicle. Failure of the audio amplifier due to water ingress in the luggage compartment.
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.