BMW 340I 2016–2017 — technical service bulletin
Bulletin B111516 · NHTSA communication 10146809 · issued Sep 1, 2016
Technical service bulletin
communication type
Engine and Engine Cooling
component
2016–2017
model years
6
vehicle entries
Official summary
B58 ENGINE: OIL LEAK FROM TURBOCHARGER. Engine oil (1) can be seen leaking from the bottom of the turbocharger near the band clamp (2). The turbocharger band clamp is loose.
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.