BMW 740I 2023 — technical service bulletin
Bulletin B160423 · NHTSA communication 10242687 · issued Aug 1, 2023
Technical service bulletin
communication type
Electrical System
component
2023
model years
5
vehicle entries
Official summary
?BMW AG has issued a Delivery Stop (effective July 12, 2023) on certain Model Year 2023 - 2024 BMW vehicles that were produced between July 21, 2022, and July 11, 2023. A software logic error in the diagnostic module for tank leaks (DMTL) could cause the Service Engine Soon light (MIL) to not turn on when there is an electrical fault with pump or diverter valve for the DMTL even after several driving cycles with the fault/s being currently present.
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.