BMW 328I 2012–2016 — technical service bulletin
Bulletin B111716 · NHTSA communication 10135023 · issued Feb 1, 2018
Technical service bulletin
communication type
Equipment
component
2012–2016
model years
5
vehicle entries
Official summary
VOLUNTARY EMISSIONS RECALL CAMPAIGN 16E-A05 - N26: Carbonization of the turbocharger sealing ring can cause the exhaust to smoke briefly during cold start up.
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.