2024 BMW G0x, G12, G20 Starter Motor Check SIB 12 06 24

BMW has issued Service Information Bulletin SIB 12 06 24 to address a potential starter motor issue affecting certain 2024 G0x, G12, and G20 series vehicles equipped with B58C and B58D engines. This service action, which supersedes SI B12 06 24 dated August 2024, aims to check and, if necessary, replace the starter motor to prevent starting problems.

The service campaign is crucial for ensuring proper vehicle operation, particularly preventing situations where the engine fails to start. Owners of affected vehicles should arrange for an inspection at their BMW dealership.

Symptoms

The primary symptom of this issue is that the "engine does not start." This occurs because a bolting fault on the long bolt screws can cause the magnets within the starter motor to twist. When this happens, the power of the starter motor decreases, making it unable to crank the engine effectively.

Diagnosis and Trigger Conditions

To diagnose the starter motor issue, technicians will follow a specific procedure using the diagnostic system. This involves reading out the fault memory and navigating through the following path:

• Troubleshooting
• Functional structure
• Drive
• Engine start and Automatic Start/Stop function
• Pinion starter motor
• Starter motor and starter motor relay
• Engine start test module

After navigating this path, a function check will be initiated, and technicians will follow the instructions provided by the test module. This process helps determine if the starter motor is defective.

Repair Procedure Summary

If the diagnostic test module indicates that the starter motor is defective, it must be replaced. The repair involves following the repair instructions outlined in REP 12 41 020 for removing and installing/replacing the starter motor. It is also noted that some of these vehicles might be affected by technical campaign 0012230600, which involves programming control units for the DME/starter motor (B12 05 24). BMW recommends processing both technical actions concurrently if applicable.

Required Parts

Should a replacement be necessary, the following parts are required:

• Starter motor: Part Number 12 41 8 671 505 (1 quantity, only if necessary)
• Hexagon bolt: Part Number 07 12 9 907 896 (3 quantity, only if necessary)

Small parts like screws, nuts, and seals, which are required for replacement according to ISTA repair instructions, must be selected from the Electronic Parts Catalog and invoiced under the special repair code of this technical campaign.

Important Warnings and What Owners Should Know

• Pre-delivery check: For new vehicles, the starter motor should be checked and replaced if necessary before customer delivery.
• Existing vehicles: If your vehicle has already been delivered, the measure should be carried out during its next workshop visit.
• Other issues: It is important to note that if a potentially defective starter motor is diagnosed, but the issue stems from other components like wires, plug connections, or the pinion starter motor supply (which are outside the scope of this service action), these additional repairs may not be covered under this technical campaign. Customers will be notified that such issues may require separate diagnosis and repair.
• TREAD Act Reimbursement: The TREAD Act reimbursement procedure does not apply to the repair remedy for this Service Action.

Owner Action

If you own a 2024 BMW X5 manufacturer_communication or any other affected model, you should contact your authorized BMW dealership to schedule an appointment for the starter motor inspection. This service action, identified by Repair Code 0012240600, will be performed free of charge under warranty. Ensure that your vehicle's VIN is checked to confirm its eligibility for this service campaign.

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Source: NHTSA ID: 11013434