2024-2025 BMW Brake System Warning SIB 34 10 25

Symptoms

Owners of affected 2024-2025 BMW vehicles may observe a specific Check Control Message (CCM) displayed in the instrument cluster. This message, which appears after certain programming updates, is:

• "CCM-2525: Brake system. Drive at moderate speed"

This BMW brake system warning indicates a potential issue with the vehicle's braking system, requiring prompt attention.

Fault Codes / DTCs

The primary fault code associated with this BMW brake system warning and the 'CCM-2525' message is:

Code	Description	Module
480B18	DSC unit: Internal position sensor linear actuator, electrical fault	DSC unit

This fault code points to an imminent failure within the Integrated Braking System (IB).

Diagnosis and Trigger Conditions

The BMW brake system warning and associated fault code 480B18 are typically triggered after the vehicle's I-Levels have been programmed to specific versions, specifically between ...24-03-505 and lower than ...24-03-540 to I-Level ...24-11-530 or higher. Technicians will determine the vehicle's current I-level using diagnostic tools like AIR or the Key Reader/Aftersales Workplace (AWP) application to confirm the conditions for this bulletin.

Important Warnings for Technicians and Owners

BMW emphasizes critical safety warnings, especially concerning work on High-Voltage (HV) systems and handling parts:

• Damaged Parts: "Do not install any part which shows visual damage as shown in the photo or has been dropped from any height."
• High-Voltage System Safety: Repairs involving HV components on Hybrid or Electric Vehicles must only be performed by properly trained personnel who have completed all applicable HV Technical Training Courses. Performing such work without proper certification can lead to severe injury or vehicle damage. Specific training courses mentioned include ST2324, ST1824, ST2006, and ST2325.
• HV Battery Work: High Voltage Battery removal and rework can ONLY be performed by a High-voltage Certified Technician with a HV Battery Certification level corresponding to a specific Electric or Hybrid vehicle.

Repair Procedure Summary

BMW Service Information Bulletin SIB 34 10 25 outlines the following steps to address the 'CCM-2525: Brake system. Drive at moderate speed' message and fault code 480B18:

1. Determine I-Level: The technician will first identify the vehicle's current I-level.
2. For vehicles where the CCM appeared after programming to I-Level ...24-11-530 or higher:
   • Delete the fault code 480B18.
   • Perform a vehicle test.
   • If fault code 480B18 returns, replace the Integrated Braking (IB) module.
3. For vehicles which are at or above I-Level ...24-11-530 or higher:
   • Perform a vehicle test.
   • Replace the IB module for the currently present fault code 480B18.

Before beginning any work on the IB, technicians are instructed to review the full replacement procedures detailed in REP 34 51 601 – “Replacing Hydraulic Unit” and REP 34 51 602 – “Replacing the Hydraulic Unit (Not Filled)”. The repair will also involve programming and encoding all vehicle control modules to the latest software I-level.

Required Tools or Parts

For the repair, specific parts and fluids may be required. Technicians should refer to the Electronic Parts Catalog (ETK) or Aftersales Information Research (AIR) system using the VIN/Chassis number to determine the exact part numbers for the 'Power brake' component, as this considers specific vehicle equipment.

Additionally, the following brake fluids and cleaners are listed:

• Brake fluid DOT 4 (12 oz bottle): Part Number 81 22 0142156
• Brake fluid DOT 4 (1 Gallon): Part Number 81 22 0142155
• Brake fluid DOT 4, LV (1/10-liter billing part number, for use with 30-liter drum): Part Number 81 22 5B43922
• BMW Group Non-Chlorinated Brake Parts Cleaner- 3% VOC (15 oz): Part Number 83 19 5A53089
• BMW Group Non-Chlorinated Brake Parts Cleaner - 45% VOC (15 oz): Part Number 83 19 2451315

Claim Information

When an IB module replacement is necessary, dealers must first check for any applicable open Integrated Brake (IB) module replacement technical campaigns (WVI / AIR) for the specific vehicle. If no such campaign exists, claims should be submitted under the normal BMW New Vehicle Limited Warranty or BMW Certified Pre-Owned Program.

The repair code for an "Integrated braking system IBC / VIP control unit Permanent malfunction" is 3450011500. Technicians should use this code along with corresponding flat rate labor operation codes. For detailed procedures on documentation and claiming, technicians should refer to SI B01 01 20 or B01 07 20.

NHTSA ID: 11020910