BMW 540I 2016–2020 — technical service bulletin
Bulletin B011219 · NHTSA communication 10176356 · issued May 1, 2020
Technical service bulletin
communication type
Air Bags
component
2016–2020
model years
20
vehicle entries
Official summary
FRONT GRILLE UPPER/LOWER ACTIVE AIR FLAPS - LTD WTY EXT TO 15 YEARS/150000: A check engine light or check control message is present for the active air flaps behind the kidney grilles. The potential component-related causes of these faults are a: 1. Mechanical issue with the linkage of the upper or lower active air flap; and/or an 2. Internal short circuit of the adjustment motor.
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.