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February 4, 2025 Service bulletin

The customer sees various check control warnings of 'Drive Fault', along with windows, doors, and...

BMW technical service bulletin B520125 for 2023 BMW 740I.

Bulletin number
B520125
Component
Electrical system
Summary
The customer sees various check control warnings of 'Drive Fault', along with windows, doors, and seatsthat do not function. There may be restraint system check control warnings. The entire K-CAN9 / Body3 CAN bus may not communicate. Various fault memory entries for the above-mentioned components may be stored: 930D86 - Function restraint system driver restricted. 930D87 - Function front passenger restraint system restricted. C9544D, C9544F - Message Missing C95452, C95454 - Signal invalid 035BF4, 035BFB, 035BFC, 035BFD - Communication via Body3_CAN corrupt. CD052C, E3852C, E4852C, E3452C, E4452C, DF852C, DFC52C, DDC52C, DF452C, E6052C, E5852C- BODY3-CAN Control Module Bus OFF 802A00, 802E00, 802C00, 803000 - Functions seat heating not available 803003, 802C03, 802E03, 802A03 - Functions seat adjustment limited

Owners of these vehicles have filed 2 complaints in the electrical category.

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