2022-2026 Audi MIB3 Navigation Database DTC B126CF0 B126CF1

Symptoms

Owners of 2022-2026 Audi vehicles may experience issues with their MIB3 navigation system after an over-the-air map update. The primary symptoms include:

• The navigation system is permanently initializing.
• The navigation map is corrupt or incomplete.

These issues indicate a problem with the navigation database, preventing the system from functioning correctly.

Fault Codes / DTCs

When the navigation database is corrupted, the information electronics control module (J794, address word 005F) may store one or both of the following Diagnostic Trouble Codes (DTCs):

Code	Description
B126CF0	Navigation system Navigation database malfunctioning
B126CF1	Navigation database not available

These codes specifically point to problems with the navigation database, confirming the need for a database reinstallation to address the Audi B126CF0 B126CF1 issue.

Technical Background

Audi has identified that an internal reset can occur during an over-the-air (OTA) navigation map update. This reset can lead to corruption of the navigation database, causing the MIB3 system to malfunction. The TSB 91 23 25 2062115/10 provides the necessary steps to correct this corruption.

Important Warnings for Owners and Technicians

• Browser Compatibility: "Do not use Internet Explorer to download the files in this TSB. Edge, Firefox, Chrome or Safari should be used." This ensures proper download of the necessary navigation database files.
• Warranty and Recall 91DZ: "If this TSB is performed in combination with recall 91DZ, the warranty instructions below do not apply as reimbursement is within the scope of that recall." Owners should be aware if their vehicle is also subject to recall 91DZ, as it impacts how the repair is claimed.
• USB Drive as Workshop Tool: "Please keep the USB flash drive with the navigation data as a workshop tool. It is not required to call into TAC or re-download the navigation data if the USB flash drive has already been created and is available. If an updated NavDB is available, it will automatically be installed via an online update after the initial NavDB is installed. It is not required to keep the vehicle in a service bay or to supervise the update after it has been started." This note clarifies that the USB drive is a reusable tool and future updates may occur automatically.

Repair Procedure Summary

The repair involves downloading the latest MIB3 navigation database, preparing a USB drive, and then installing the database using the Audi diagnostic system (ODIS) and the vehicle's MMI interface. The process includes:

1. Download Navigation Database: Obtain the current MIB3 Navigation database files from the provided Audi link using a compatible web browser.
2. Prepare USB Drive: Download both files to your PC, then format a 32GB or larger USB drive to NTFS. This is crucial for the vehicle to recognize the update.
3. Extract Files: Use 7-zip to extract the downloaded NAV files to your C drive. The extracted folder should contain 'Data' and 'Meta' folders.
4. Copy to USB: Copy the extracted 'Data' and 'Meta' folders, along with any other extracted files, directly to the root of the formatted USB drive.
5. Eject USB: Safely eject the USB drive from your computer.
6. Erase Navigation Databank (ODIS): In ODIS, execute the test plan to erase the existing navigation databank in the J794 information electronics control module. This prepares the system for the new database.
7. Vehicle Sleep Cycle: End the diagnostic session and allow the vehicle to enter a sleep cycle.
8. MMI Software Update: Insert the prepared USB drive into the vehicle. Access the MMI settings, navigate to 'MMI Settings' > 'system maintenance' > 'software update'. The update should now be available for installation.

This procedure effectively addresses the Audi B126CF0 B126CF1 fault by providing a clean, updated navigation database.

Required Tools or Parts

To perform this repair, technicians will need:

• A 32GB or larger USB Flash Drive (locally sourced).
• Access to the ODIS diagnostic system.
• A computer with a compatible web browser (Edge, Firefox, Chrome, or Safari) and 7-zip software.

Warranty Information

Warranty claims for this procedure are handled under specific guidelines:

• Claim Type: Applicable for vehicles up to 48 months/50,000 miles, or G10 for CPO Covered Vehicles (owner verification required). If the vehicle is outside of warranty, this TSB is for informational purposes only.
• Service Number: 9196
• Damage Code: 0039
• Labor Operations: Programming the display and operating control unit (9196 2599, 20 TU) and checking/adjusting the display and operating control unit (9196 0599, 10 TU).
• Diagnostic Time: GFF (0150 0000), with a maximum of 25 TU.
• Road Test: No allowance for road tests before or after the service procedure.
• Claim Comment: As per TSB 2062115/10. All claims must adhere to the Audi Warranty Policies and Procedures Manual.

Superseded Bulletin Information

This Technical Service Bulletin, 91 23 25 2062115/10, dated August 18, 2023, supersedes Technical Service Bulletin Group 91 number 23-61, dated January 17, 2023. The revision history indicates updates to model years, title, warranty information, and NavDB download instructions.

Source: NHTSA ID 10241456