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November 9, 2023 Service bulletin

Check Control message (CCM) indicates: (ID 213): Stop, exercising due care

BMW technical service bulletin B120721 for 2019-2024 BMW X5, 2023 BMW 3 Series and 2018-2024 BMW 330I and others.

Bulletin number
B120721
Component
Engine and engine cooling
Summary
Check Control message (CCM) indicates: (ID 213): Stop, exercising due care. Voltage supply The Service Engine Soon light is on with the following DME Fault Code: 21B209 - Starter alternator / belt for 48V system (OSA_RIEMEN_RISS): Belt betweenCombustion engine and starter generator torn And/or one or more of the following other issues are also occurring: Noise in the area of the belt drive. Odor from the engine compartment. Smoke formation in the area of the belt drive. Drive belt damaged or prematurely worn. Torn drive belt.

Owners of these vehicles have filed 350 complaints in the engine category.

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