BMW 840I 2024 — technical service bulletin
Bulletin B064126 · NHTSA communication 11036432 · issued Aug 6, 2026
Technical service bulletin
communication type
Engine
component
2024
model years
5
vehicle entries
Official summary
Fan Return
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.