2025 Audi Q5 Software Update for Electrical System Warnings

Audi has issued Technical Service Bulletin (TSB) 2077960/6 to address a range of electrical system and driver assistance issues affecting certain 2025 Audi Q5 and SQ5 vehicles. This TSB outlines a comprehensive software update, identified as 03.01.00/C (28.11.01) KD1**, which aims to rectify multiple reported complaints and improve vehicle reliability. Owners experiencing warning messages or system malfunctions related to their vehicle's high-voltage system, occupant detection, or driver assist features should be aware of this important update.

The 2025 Audi Q5 software update is crucial for maintaining optimal performance and safety. This bulletin provides detailed instructions for technicians to perform the update, ensuring that various control modules and services function correctly. It also highlights specific conditions and procedures to follow during the software installation process.

Symptoms Addressed by the Update

This combined software update resolves several specific complaints that owners might experience. These issues often manifest as warning messages or unexpected system behavior. The resolved complaints include:

• High-Voltage Electrical System Warnings: Owners may have seen a "90 Warning message about high-voltage electrical system" accompanied by diagnostic trouble codes (DTCs) U014600, U112100, and U041200. This update aims to eliminate these critical warnings.
• Rear Occupant Detection / Alarm Issues: The software update fixes problems related to the rear occupant detection system, which could lead to an "unwanted horn and flashing lights triggered" scenario. This is documented under TSB 2077961.
• Headlight Malfunctions: An instrument cluster message stating "Left/right main beam headlight defective. See owner's manual" (TSB 2078609) is also resolved by this update, ensuring proper headlight operation.
• Driver Assist System Warnings: For Q5 models, the update addresses instances where driver assist systems, specifically side assist, displayed "side assist issues warnings for no reason" (TSB 2078626), improving the reliability of these safety features.

Fault Codes / DTCs

The software update specifically targets and resolves issues associated with the following Diagnostic Trouble Codes (DTCs):

• U014600: This code is linked to the high-voltage electrical system warnings.
• U112100: Another code associated with high-voltage system malfunctions.
• U041200: Also related to the high-voltage electrical system, indicating communication or functional errors.
• 8067: This error code may appear if the ODIS diagnostic tester cancels the flashing procedure. If this code occurs, the TSB indicates that this particular software update does not apply to the vehicle, and further diagnostics may be needed.

Important Warnings for Owners and Technicians

Audi has provided several critical warnings and advisories related to this software update to ensure safety and proper procedure:

• Superseded TSB: If TSB 2079690, titled '00 Combined software update 03.10.00/C (28.13.01) KD2', is available, technicians must perform that update instead. It is explicitly stated that performing TSB 2077960/6 is not necessary if the KD2 version is available.
• High-Voltage Battery Safety: To prevent the high-voltage battery from charging during the software update, the high-voltage charging cable on vehicles with high-voltage components must be unplugged BEFORE the SVM code is entered. Charging the high-voltage battery during a software update can cause damage to the high-voltage components.
• Update Order: It is crucial that all previous combined software updates (open field campaigns) have been completed first. Updates must be performed in the correct order to ensure proper functionality.
• Privacy Mode and Key User: Owners should be aware that privacy mode (mobile data off) is automatically deactivated after the software update and may need to be reactivated. In some cases, an existing key user may be deleted, requiring the customer to add the key user again with their username and password.
• Infrastructure Mode: Flashing the software using infrastructure mode is not permissible due to its susceptibility to interference and errors. A USB cable connection is strongly recommended for reliable data transmission.

Diagnosis and Trigger Conditions

This software update is applicable if a vehicle exhibits one or more of the complaints listed above. Technicians must ensure that at least one of the TSBs referenced for individual complaints applies to the vehicle before proceeding with the update. If no applicable TSB is found for the specific complaint, the KD1** package may not be suitable, and warranty billing for the procedure will not be possible.

If the ODIS diagnostic tester displays error code 8067 during the flashing procedure, it indicates that this specific software measure does not apply to the vehicle. In such cases, technicians are advised to consult the dealer portal for planned system unavailability or contact Software Version Management (SVM) support if the error persists.

Repair Procedure Summary

The 2025 Audi Q5 software update involves a series of precise steps to ensure successful installation and proper vehicle function. The total duration of the combined software update is approximately one hour. Here's a summary of the key steps:

1. Preparation: Ensure the vehicle's date and time are correct (set manually or ensure GPS reception). Activate privacy mode (mobile data off), switch off background lighting in the HMI, and set the light switch to the "off" position. Only one vehicle key should be inside the vehicle, placed on the hazard warning lights switch. The sunroof, if fitted, must be closed. No other work should be performed on the vehicle during the update.
2. Power Management: Connect a battery charger unit as instructed in TSB 2011732 to maintain stable voltage. Switch off all non-essential electrical equipment (e.g., blower, seat heater, lights).
3. Diagnostic Connection: Move the selector lever to the 'P' position. Connect the diagnostic tester (VAS 6160/VAS 6150 with ODIS version 24.3.0 or later) to the vehicle using a USB cable. Ensure port 8080 on the diagnostic device is enabled for incoming TCP connections.
4. Software Flashing: Select "flash" and then "SVM code input" on the diagnostic tester. For Audi Q5 models, the specific SVM code to use is BLQ5100KUL. (Note: For Q6 and A6 e-tron models, the SVM code is BLPPE100KUL). The driver's door must remain open throughout the flashing procedure. If the procedure is interrupted, retry the SVM code. Be aware that the progress bar may remain at 0% for 10-15 minutes at the beginning of the update.
5. Post-Update Procedures: After the update, switch the ignition off and on again. Send the flash log online. Perform a bus sleep cycle by closing all doors and the hood for at least 5 minutes. Conduct a road test/calibration drive at a speed above 25 mph. Erase the entire event memory and initialize the sunroof/sun blind (if fitted) using Guided Fault Finding. Finally, check and initialize the tire pressures and deactivate privacy mode again.

Required Tools or Parts

Performing this 2025 Audi Q5 software update requires specific diagnostic equipment to ensure accuracy and successful completion:

• VAS 6160/VAS 6150: This is an Audi/Volkswagen Group diagnostic tester. It must be running the current version of ODIS software.
• ODIS Diagnostic Tester Version 24.3.0 or later: This specific software version is absolutely essential for carrying out the update. Using an older version may lead to complications or failure of the update.

No specific replacement parts are typically required for this software update, as it addresses software-related issues rather than hardware failures.

Owner Action

If you own a 2025 Audi Q5 or SQ5 and have experienced any of the symptoms described, such as high-voltage system warnings, unexpected horn or flashing lights, headlight malfunction messages, or erroneous driver assist system warnings, it is recommended to contact your authorized Audi dealership. Inform them about the issues you are facing and mention Technical Service Bulletin 2077960/6.

The dealership technicians will be able to diagnose your vehicle and perform the necessary software update. This update is typically covered under warranty. The procedure takes approximately one hour, but the vehicle may need to be at the dealership for a longer period depending on their schedule. Ensure that your dealership confirms the application of the correct software version and performs all associated post-update procedures.

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Source: NHTSA ID: 11025349