2021-2024 BMW RSU Causes Comfort Access Faults

BMW has released Technical Service Bulletin (TSB) SIB 61 11 24 to address issues experienced by owners of various 2021-2024 BMW models. This bulletin specifically targets problems that arise after a Remote Software Upgrade (RSU) has been performed on the vehicle.

The TSB details how the functionality of the Comfort Access and Passive Go/Exit features may be reduced. This can lead to inconvenience for drivers who rely on these keyless entry and exit systems. The core problem behind these BMW RSU Comfort Access faults is a communication issue within the vehicle's electrical system.

Symptoms

Owners may notice that their Comfort Access and Passive Go/Exit features do not work as expected after a Remote Software Upgrade. This reduced functionality is often accompanied by specific error memory entries stored in the Basic Central Platform (BCP) module.

Fault Codes / DTCs

The following diagnostic trouble codes (DTCs) may be stored in the Basic Central Platform (BCP) module, indicating a programming defect in the remote control receivers:

Code	Description
80424A	Remote control receiver at the front (FBD5 VM): Programming defective
80424B	Remote control receiver at the rear (FBD5 HM): Programming defective
80424C	Remote control receiver at the front left (FBD5s VL): Programming defective
80424D	Remote control receiver at the front right (FBD5s VR): Programming defective
80424E	Remote control receiver at the rear right (FBD5s HR): Programming defective
80424F	Remote control receiver at the rear left (FBD5s HL): Programming defective

Diagnosis / Trigger Conditions

The root cause of these BMW RSU Comfort Access faults is identified as unfavorable communication between the BCP module and one or more radio remote control (FBD5) receivers. This communication breakdown occurs specifically after a BMW Remote Software Upgrade has been performed.

Important Warnings

BMW explicitly states that part replacement will not provide a solution for this issue. The problem is software-related, not a hardware failure, meaning that replacing the remote control receivers or other components will not resolve the reduced Comfort Access and Passive Go/Exit functionality. Additionally, during the programming procedure, it is crucial to ensure that no telephone is connected to the vehicle.

Repair Procedure Summary

The correction for these BMW RSU Comfort Access faults involves programming and pairing the remote-control receivers (FBD5) using specific ISTA Service functions. A BMW technician will perform the following steps:

1. Utilize the service function titled "ABL Initialize remote control receiver(ultra-wideband) and program it." This test plan is found within the ISTA diagnostic system by navigating through: Vehicle Management > Service functions > Body > Locking and security functions > Remote control, key > Remote control receiver (UWB).
2. Open the test plan and select option (2) for "Programming remote control receiver." The ISTA screen will display options for which receiver to program.
3. Initiate the receiver programming by selecting option (8) "Program all (recommended)." This programming process can take up to 30 minutes.
4. After successful programming, the technician will return to the "Teach in and program" selections window.
5. Next, select "Pairing the remote-control receivers" to complete the pairing process. The ISTA screen will show the pairing status for each FBD5 receiver, confirming if pairing was successful.
6. Ensure all receiver statuses show "Pairing successful."
7. Clear any remaining fault codes from the BCP module and verify that the FBD5 receiver faults have not reoccurred.
8. Finally, confirm that all Comfort Access and Passive Go/Exit features are working as designed.

Warranty and Claim Information

This repair is covered under the terms of the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks, or the BMW Certified Pre-Owned Program. The associated Repair Code for this issue is 6138460200, described as "Receiver, radio remote control, vehicle access (FBD5 / FBD5s) Software error / internal device fault."

Technicians will use specific labor operations for claiming this repair. These include 00 00 006 or 00 00 556 for carrying out a vehicle test, 61 21 528 for supporting voltage/recharging the vehicle battery, and 61 00 730 for programming/encoding control unit(s) and deleting fault memory. Additional labor operations like 61 00 006* or 00 58 500* may be used for vehicle diagnosis, and 66 10 000 for the work time related to pairing and re-checking receiver function.

If other programming and encoding Technical Campaigns are open for the vehicle, the programming and encoding procedure may only be invoiced once. Technicians are instructed to perform any additional required work and close other open campaigns. If control modules fail during reprogramming, consequential repair work procedures should be claimed under the specified Repair Code, referring to BMW Service Information Bulletins like SI B01 01 20 or B01 07 20 for guidance on documentation and claiming.

NHTSA ID: 10255866