BMW 530I 2017 — technical service bulletin
Bulletin B640917 · NHTSA communication 10136737 · issued Dec 1, 2017
Technical service bulletin
communication type
Unknown OR Other
component
2017
model years
4
vehicle entries
Official summary
WARM AIR DISCHARGE FROM FOOTWELL VENT WITHOUT REQUEST: While driving, and without request, the footwell vent discharges warm air.
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.