BMW X3 2018 — technical service bulletin
Bulletin B640518 · NHTSA communication 10145304 · issued Jun 1, 2018
Technical service bulletin
communication type
Visibility
component
2018
model years
2
vehicle entries
Official summary
EXCESS NOISE WHEN DEFROST BLOWER IS AT MAX: Loud, rushing, wind noise is heard from ventilation outlets, as shown in video, https://tinyurl.com/V640418 when defroster blower is set at maximum speed.
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.