2025 Audi A5, S5 Electric Door Handle Issue After KD2 Update

Audi has released Technical Service Bulletin (TSB) 2080648/1, dated January 14, 2026, to address a specific issue affecting the electric exterior door handles on certain 2025 Audi models. This bulletin provides guidance for situations where one or more electric exterior door handles cannot be reached following a KD2 package update. The TSB applies to 2025 Audi A5 and S5 models, as well as the A6 Sportback e-tron and S6 Sportback e-tron. Owners of these vehicles who experience issues with their electric door handles after a software update should be aware of this bulletin.

Symptoms

The primary symptom described in TSB 2080648/1 is that "one or more electric exterior door handles cannot be reached" after the KD2 software update. This issue specifically occurs after the "00 Combined software update 03.10.00/C (28.13.01) KD2" has been performed. When this happens, the electric exterior door handles remain in an undefined status, meaning they may not function correctly or respond as expected.

Diagnosis and Trigger Conditions

To diagnose the issue where the 2025 Audi A5 electric door handle is unresponsive, technicians are instructed to perform a vehicle self-diagnosis. This involves checking specific diagnostic addresses within the vehicle's system. The relevant diagnostic addresses to verify if the electric exterior door handles still cannot be reached are 4201, 4202, or 4203. The initial step in diagnosis also involves consulting the current flow diagram for the corresponding fuse.

Repair Procedure Summary

Audi's recommended service procedure for addressing the 2025 Audi A5 electric door handle issue involves a multi-step approach:

1. Initial Reset: The first step is to remove the corresponding fuse for the electric exterior door handles. This fuse should remain removed for at least 10 minutes to allow the system to reset.
2. Diagnosis After Reset: After the fuse has been reinstalled, technicians must check if the electric exterior door handles can now be reached. This is verified through the vehicle's self-diagnosis system, specifically using diagnostic addresses 4201, 4202, or 4203.
3. Part Replacement (If Necessary): If, after the fuse removal and subsequent self-diagnosis, the electric exterior door handles still cannot be reached, the affected electric door handles must be replaced.
4. Software Update Completion: Following any necessary repairs or resets, it is crucial to complete the KD2 update. This must be done using the specific SVM code described in TSB 2079690, which refers to the combined software update.

Required Parts and Tools

It is important to note that the part numbers mentioned in TSB 2080648/1 may differ from those listed in the Electronic Parts Catalog (ETKA). Technicians are instructed to use only the part numbers specified within this TSB, including any superseding part numbers. Examples provided include:

• If index B is suggested, fit index M: 8B3837811B suggested > fit 8B3837811M.
• If index E is suggested, fit index N: 85H837811E suggested > fit 85H837811N.

Important Warnings

Owners should be aware that if their vehicle is outside of its warranty period, this Technical Service Bulletin is provided for informational purposes only. In such cases, the repair costs may not be covered by Audi warranty.

Warranty Information

For warranty claims related to this issue, Audi specifies the following details. All warranty claims submitted for payment must adhere to the Audi Warranty Policies and Procedures Manual, and claims are subject to review or audit by Audi Warranty.

• Claim Type: If the vehicle is outside of any warranty, this Technical Service Bulletin is informational only.
• Service Number: 5711
• Damage Code: KD02
• Claim Comment: As per TSB 2080648/1

Labor Operations (Reset Only):

Operation	Code	Time Unit (TU)
Repair door handle (reset)	5711 4199	20 TU
Self diagnosis	0129 0050	See SRT
GFF	0150 0060	See SRT

Labor Operations (Reset with Part replacement):

Operation	Code	Time Unit (TU)
Repair door handle (reset)	5711 4199	20 TU
Remove and install front mounting bracket	5707 19xx	See SRT
Remove and install rear mounting bracket	5807 19xx	See SRT
Remove and install 2 rear mounting brackets	5807 20xx	See SRT
Self diagnosis	0129 0050	See SRT
GFF	0150 0060	See SRT

Source: NHTSA ID: 11028424