BMW 330I 2019–2021 — technical service bulletin
Bulletin B110320 · NHTSA communication 10184572 · issued Nov 1, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2019–2021
model years
3
vehicle entries
Official summary
REPLACE EXHAUST TURBOCHARGER: Possible loss of engine output and illumination of the malfunction indicator lamp (MIL).
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.