BMW 330I 2025 — technical service bulletin
Bulletin B111025 · NHTSA communication 11026946 · issued Dec 12, 2025
Technical service bulletin
communication type
Engine
component
2025
model years
6
vehicle entries
Official summary
Coolant is leaking from the oil filter housing.
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.