BMW 328D 2014–2018 — technical service bulletin
Bulletin B011918 · NHTSA communication 10175262 · issued Apr 1, 2020
Technical service bulletin
communication type
Electrical System
component
2014–2018
model years
18
vehicle entries
Official summary
N47/n57t nox sensors before/after the scr-ltd wty ext to 10 yrs/120000 mi: malfunction indicator lamp (mil) on.
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.