2026 Audi Q8 Rear Seat Backrest Heating Not Working TSB

Audi has issued Technical Service Bulletin (TSB) 2079319/1 to address a common complaint among owners of certain 2026 Audi Q8, SQ8, and RS Q8 vehicles. This bulletin specifically targets an issue where the rear seat heating system fails to warm the backrest, only providing heat to the seat surface. This TSB provides a clear solution for technicians to restore full functionality to the 2026 Audi Q8 rear seat heating system.

Symptoms

Owners of affected vehicles may notice that when the rear seat heating is activated, only the seat cushion becomes warm. The primary symptom is that the "seat heater in the rear only heats the seat surface, but not the backrest." This indicates a partial failure of the heating element or its control, leading to discomfort for rear passengers.

Technical Background

Audi has identified the root cause of the 2026 Audi Q8 rear seat heating problem as a software anomaly. Specifically, the issue resides within the Electronic Central Electric control unit, which is identified by diagnostic address 0009. The original software version for this control unit is 0810. This software glitch prevents the backrest heating function from operating correctly. A new target data container version was made available in series production from calendar week 30/2025 to address this issue.

Diagnosis

To confirm the presence of this issue, a workshop technician will attempt to reproduce the customer's complaint. The diagnostic process involves checking the Electronic Central Electric control unit (diagnostic address 0009) for proper function. The TSB confirms that the complaint can be reproduced in the workshop, indicating a consistent software-related fault rather than a hardware failure.

Repair Procedure Summary

The repair for the 2026 Audi Q8 rear seat heating issue, as outlined in TSB 2079319/1, involves a software update to the Electronic Central Electric control unit (diagnostic address 0009). Technicians will connect a diagnostic tester to the vehicle and access the control unit. They will then perform a Software Version Management (SVM) control unit configuration for diagnostic address 0009. This process will update the control unit's software to the specified target data container version 4M8909514AC, which includes software version 0063. This update is designed to resolve the underlying software anomaly preventing the rear seat backrest heating from functioning.

Required Software and Parts

The primary requirement for this repair is the specific software update. Technicians will need access to a diagnostic tester capable of performing SVM updates. The update involves installing target data container 4M8909514AC, which contains software version 0063. No physical parts are typically replaced for this software-related fix.

Warranty Information

Audi provides specific guidelines for warranty claims related to this TSB 2079319/1. The Service Number for this operation is 9710, and the Damage Code is 0039. There are two specified labor operations for the software update:

• 0151 0010: Software update, with reference to the Service Repair Time (SRT) and associated operations.
• 0151 0060: Software update, where the time is stated on the diagnostic protocol.

All warranty claims submitted for payment must adhere to the Audi Warranty Policies and Procedures Manual and are subject to review or audit by Audi Warranty. The claim comment should specify "As per TSB 2079319/1."

What Owners Should Know

It is important for owners to understand the warranty implications of this Technical Service Bulletin. Audi states: "If the vehicle is outside of any warranty, this Technical Service Bulletin is informational only." This means that if your 2026 Audi Q8 is no longer covered by its factory warranty, you may be responsible for the cost of this software update.

NHTSA ID: 10250625