BMW X5 2014–2017 — technical service bulletin
Bulletin B640219 · NHTSA communication 10159141 · issued Mar 1, 2019
Technical service bulletin
communication type
Equipment
component
2014–2017
model years
7
vehicle entries
Official summary
HUMMING NOISES WHEN AIR CONDITIONING IS ACTIVATED. Humming or high-pitched vibrating noises can be heard inside the vehicle when the air conditioning (A/C) is switched on.
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.