BMW 540I 2016–2017 — technical service bulletin
Bulletin B010119 · NHTSA communication 10163021 · issued Jun 1, 2019
Technical service bulletin
communication type
Engine and Engine Cooling
component
2016–2017
model years
8
vehicle entries
Official summary
Radiator grill upper and lower active air flaps: limited warranty extension to 10 years/120,000 miles.
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.