2021-2025 Audi Door Lock Malfunction TSB 2063236/10

Audi has issued Technical Service Bulletin (TSB) 2063236/10, scheduled for release on May 21, 2025, to address various complaints related to the front or rear door locks in a wide range of 2021-2025 Audi models. This bulletin covers issues where doors may not open or lock correctly, and it is associated with specific Diagnostic Trouble Codes (DTCs) such as B122D29, B14FF29, and B122B13. The TSB provides comprehensive diagnostic and repair procedures for technicians to accurately identify and resolve the underlying causes of these door lock malfunctions.

Revision History

This Technical Service Bulletin has undergone several revisions to ensure accuracy and completeness:

• Revision 10 (May 21, 2025): Revised header to add diagnostic trouble codes and revised Condition to add a note.
• Revision 9 (May 9, 2025): Revised Service to add a note.
• Revision 8 (April 10, 2025): Revised header to update models and model years, updated diagnostic trouble codes. Condition verbiage, Service, Warranty, and Required Parts and Tools (removed tools) were also revised.

Symptoms of an Audi Door Lock Malfunction

Owners of affected 2021-2025 Audi vehicles may experience several symptoms indicating a problem with their door locks. These issues can impact both the functionality and security of the vehicle.

Common customer complaints include:

• The front or rear door (left and/or right sides) cannot be opened from the outside or the inside.
• Messages appearing on the instrument cluster, such as those related to the "exit warning system" or "central locking", indicating an issue with a front or rear door.
• The vehicle is locked, but it is still possible to open a door without using a key, compromising security.

Workshop findings often corroborate these customer reports, noting that door locks do not work as expected. Technicians frequently observe various complaints pointing to a general problem with the door lock mechanism.

Fault Codes / DTCs

When diagnosing an Audi door lock malfunction, technicians may find one or several of the following Diagnostic Trouble Codes (DTCs) logged in the vehicle's event memory. These codes can be either intermittent or static, providing clues about the nature and persistence of the fault.

Diagnostic address	Diagnostic trouble code	Fault symptom	Storage state
00BC - Rear passenger side door electronics	B122D29: Lock unit for central locking implausible signal		Intermittent
0042 - Driver's door electronics	B122B13: Central locking motors Open circuit		Intermittent
0042 - Driver's door electronics	B122D29: Lock unit for central locking implausible signal		Intermittent
0052 - Passenger's door electronics	B122D29: Lock unit for central locking implausible signal		Intermittent
00BB - Rear drivers side door electronics	B14FF29: Motor for child safety lock implausible signal		Intermittent
00BC - Rear passenger side door electronics	B14FF29: Motor for child safety lock implausible signal		Intermittent
00BB - Rear drivers side door electronics	B122D29: Lock unit for central locking implausible signal		Intermittent
0052 - Passenger's door electronics	B122B13: Central locking motors Open circuit		Intermittent
0042 - Driver's door electronics	B14FF29: Motor for child safety lock implausible signal		Intermittent
0042 - Driver's door electronics	B14FF29: Motor for child safety lock implausible signal		static
0042 - Driver's door electronics	B122B13: Central locking motors Open circuit		static
0042 - Driver's door electronics	B122D29: Lock unit for central locking implausible signal		static
0052 - Passenger's door electronics	B122D29: Lock unit for central locking implausible signal		static
0052 - Passenger's door electronics	B122B13: Central locking motors Open circuit		static
00BB - Rear drivers side door electronics	B14FF29: Motor for child safety lock implausible signal		static
00BB - Rear drivers side door electronics	B122D29: Lock unit for central locking implausible signal		static
00BC - Rear passenger side door electronics	B14FF29: Motor for child safety lock implausible signal		static
00BC - Rear passenger side door electronics	B122D29: Lock unit for central locking implausible signal		static

Technical Background of the Door Lock System

The door lock system in these Audi vehicles is a sophisticated electromechanical assembly. When an interior or exterior door handle is operated, the action is transmitted electrically to the door control unit via a microswitch. This microswitch then activates an electric motor within the door lock mechanism. The motor's function is to release the rotary latch, allowing the door to open with minimal effort.

Despite the advanced electronic control, the system retains a mechanical backup. Two Bowden cables provide a direct mechanical connection between the door lock and both the interior and exterior door handles. In situations where the microswitch or control motor fails, or if warning messages are displayed, the door can still be opened mechanically. This requires pulling the interior door handle out much further than its normal range, typically twice, to engage the mechanical release. Similarly, if the door cannot be opened via the interior handle, it might still be possible to open it using the exterior handle after activating the lock cylinder or the interior handle.

Audi has also optimized the door lock manufacturing process to enhance reliability.

Diagnosis and Repair Procedure Summary

Before undertaking any component replacement for an Audi door lock malfunction, technicians are instructed to follow a detailed diagnostic procedure outlined in TSB 2063236/10. This approach helps to accurately pinpoint the cause of the problem and avoid unnecessary repairs.

1. Initial Assessment and Customer Interview: The first step involves clarifying the details of the complaint with the customer. Technicians should inquire about specific operating habits, such as whether the interior door handle is pulled too quickly or pulled past its end stop. Such actions can sometimes result in messages or faults without there being a problem with the door lock. It's also important to determine if the door opens when the interior handle is pulled twice, or if the exterior handle works, as these indicate a functional mechanical override rather than a fault. Technicians should also refer to the Owner's Manual, Workshop Manual, and Guided Fault Finding (GFF) for corresponding information. An SoST film regarding the operating concept, incorrect operation, and messages is also available for reference.

2. Event Memory Check and Reset: For every complaint, technicians must read out the event memory in the control unit and erase any stored entries. After erasing, the ignition should be cycled (turned off and on), and the affected door opened and closed. A subsequent check of the event memory will confirm if the faults reappear. If the entries do not return and the door operates normally, the door lock is considered functional.

3. Mechanical Inspection of Components: A thorough mechanical inspection of the door lock components is crucial. This includes checking the electrical wiring and the mechanical Bowden cables at the door lock and interior/exterior door handles for damage or irregularities. Issues like twisting, incorrect routing, traces of water or ice, or stiffness can impair door lock operation. Any damaged components should be replaced as necessary.

4. Exterior Door Handle Check: The exterior door handle's return to its flush original position (rest position) must be verified. If it does not return correctly, technicians should refer to TSB 2060196: "57 Exterior door handles do not return to the zero position" for specific modification or replacement procedures. Additionally, the door setting should be checked for ease of movement and correct closing, and adjusted as necessary.

5. Further Diagnostics: If the complaint persists or event memory entries continue to be logged after these initial checks, technicians should proceed with Guided Fault Finding (GFF) as per the workshop manual. This will guide them through more in-depth diagnostic steps.

Important Warnings for Owners and Technicians

Owners and technicians should be aware of specific operational nuances and repair guidelines to prevent misdiagnosis and ensure proper functionality of the door lock system.

• Incorrect Operation with Convenience Key Sensor: For vehicles with a mechanical exterior door handle and convenience key (Figure 1 in the TSB shows a sensor on the door handle), be aware of the possibility of incorrect operation by the customer. To lock the vehicle, close the door and touch the sensor on the door handle once. Do not take hold of the door handle when doing so, otherwise the vehicle will not be locked. Once the doors have been locked, they cannot be opened again immediately. This enables you to check that the doors are properly closed. When opening the doors, care must be taken not to touch the sensor on the exterior door handle at the same time (e.g., with the thumb), as otherwise the vehicle will be locked again, leading to incorrect operation by the user.
• Repair Protocol Adherence: Replacing parts or attempting repairs without taking this TSB into account will not fix the problem. Unjustified work/replacement parts will be charged back. In this case, invoicing under warranty is not permitted. It is critical for technicians to follow the diagnostic and repair procedures outlined in TSB 2063236/10 to ensure effective resolution and proper warranty claim processing.

Warranty Information

For vehicles still under warranty, claims related to this Audi door lock malfunction must adhere to the Audi Warranty Policies and Procedures Manual. If the vehicle is outside of any warranty, this Technical Service Bulletin is for informational purposes only.

Damage Code: 0040

Service Numbers:

• 5717 Door lock front
• 5817 Door lock rear

Labor Operations:

Labor Operation	Code	Time Units (TU)
Check 1-4 door handles	5711 0199	10 TU
Front door trim panel remove + reinstall	7059 1900	See SRT with associated operations
2 Front door trim panel remove + reinstall	7059 2000	See SRT with associated operations
Check 1 front Bowden cable and wiring	5719 0199	10 TU
Check 2 front Bowden cables and wiring	5719 0299	20 TU
Door lock front left remove + reinstall	5717 1950	See SRT with associated operations
Door lock front right remove + reinstall	5717 1951	See SRT with associated operations
2 Door lock front remove + reinstall	5717 2099	50 TU + 70592000
2 Door lock front remove + reinstall (Q8 e-tron, e-tron)		120 TU + 70592000
2 Door lock front remove + reinstall (A7)		170 TU + 70592000
Rear door trim remove + reinstall	7073 1900	See SRT with associated operations
2 Rear door trims remove + reinstall	7073 2000	See SRT with associated operations
Check 1 rear Bowden cable and wiring	5819 0199	10 TU
Check 2 rear Bowden cables and wiring	5819 0299	20 TU
Door lock rear remove + reinstall	5817 1950	See SRT with associated operations
Door lock rear remove + reinstall	5817 1951	See SRT with associated operations
2 Door lock rear remove + reinstall	5817 2099	50 TU
GFF	0150 0060	Time stated on the diagnostic protocol
Charge battery	2706 8950	See SRT with associated operations

Claim comments should explicitly state "As per TSB 2063236/10" to ensure proper processing.

Additional Resources for Technicians

For more in-depth information regarding the door lock system and related vehicle components, technicians can consult several resources:

• Owner's Manual: Chapter "Opening and closing" provides general information for vehicle owners.
• SSP 970293: "The 2019 A8 Electrical and Electronic Systems" offers detailed insights into the electrical architecture.
• SSP 990493: "The 2019 A8 Introduction" provides an overview of the A8 platform.
• SSP 990393: "The 2019 A8 Driver Assistance Systems" covers relevant driver assistance features.
• TSB 2060196: "57 Exterior door handles do not return to the zero position" is a necessary accompanying bulletin for specific handle issues.

Source: NHTSA ID 11018964