2025 BMW 5 Series / i5 Parking Brake Actuator Failure

BMW has released Service Information Bulletin SIB 34 11 25 to address a manufacturing defect affecting the right side electromechanical emergency brake (EMF) actuator in certain 2025 BMW 5 Series Sedan and i5 Sedan vehicles. This issue can prevent the parking brake from being applied or released correctly, leading to a critical warning message for the driver.

Symptoms

Owners of affected vehicles may experience issues with the parking brake system. The primary symptom is the parking brake actuator not winding correctly, which prevents it from engaging or disengaging as intended. This malfunction triggers a specific Check Control message in the vehicle's display:

• "Parking brake failed. When parking, secure the vehicle against rolling away. Must be checked by the Service Partner."

Despite this warning, the vehicle's unaffected side and the transmission lock will still provide some retention. However, it is crucial to address the underlying issue to ensure full parking brake functionality and safety.

Cause of the Fault

The root cause of the BMW i5 parking brake failed issue is identified as a manufacturing error within the parking brake actuator itself. This component, also known as the electromechanical emergency brake (EMF), is critical for the proper operation of the parking brake system.

Important Warnings for Owners and Dealers

BMW emphasizes that this repair is considered "Mobile Friendly," meaning it may be eligible for completion via Mobile Assistance for qualifying service centers. Dealers are instructed to perform this procedure on all affected vehicles before customer delivery. If a customer has already taken delivery, the repair should be performed the next time the vehicle is in the shop, provided the campaign remedy is available. Dealers should check their inventory promptly for affected vehicles.

Repair Procedure Summary

The correction for the BMW i5 parking brake failed condition involves replacing the faulty right side parking brake actuator. The service action, identified as SIB 34 11 25, directs technicians to follow the detailed steps outlined in Repair Procedure (REP) 34 52 162, which covers the removal and installation of the EMF actuator.

Required Parts

To complete this service action, specific parts are required:

• Part Number: 34 20 8 843 108
  • Description: Repair kit EMF actuator right
  • Quantity: 1
• Part Number: 34 20 8 846 401
  • Description: Repair kit O-ring
  • Quantity: 1

Owner Action

If you own a 2025 BMW 5 Series Sedan or i5 Sedan and experience the "Parking brake failed" message, or if you are concerned your vehicle might be affected by Service Information Bulletin SIB 34 11 25, you should contact your authorized BMW service partner. They can check your vehicle's status using its VIN to determine if this service action is open for your car. The repair code for this service action is 0034220300, and the work packages for claiming reimbursement are 00 78 799 (for pre-delivery) or 00 78 251 (for post-delivery). This repair will be covered under warranty as a service action.

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Source: NHTSA ID: 11022100