2021 Audi Q8 Hazard Lights Activate On Their Own TSB

Audi has released Technical Service Bulletin (TSB) 94 21 44 2059217/2 to address a concern with hazard warning lights activating unexpectedly or being unable to be switched off in certain 2021 Audi A6, A7, A8, Q8, RS6, RS7, S6, S7, SQ8, and RSQ8 models. This bulletin, dated September 1, 2021, supersedes TSB Group 94 number 20-22 from April 10, 2020, and provides updated information for technicians.

Symptoms

Owners of affected 2021 Audi A6, A7, A8, Q8, RS6, RS7, S6, S7, SQ8, and RSQ8 models may experience specific issues related to their vehicle's hazard warning lights. The primary complaints include the "Hazard warning lights activate on their own without input," meaning the lights turn on without the driver initiating them. Additionally, drivers may find that their "Hazard lights may not be able to be switched off" once they have activated, leading to a persistent flashing condition. This can be particularly concerning and distracting during operation.

Fault Codes / DTCs

According to Audi's workshop findings, there are no relevant Diagnostic Trouble Codes (DTCs) stored in the vehicle's system when this particular hazard light issue occurs. This means that standard diagnostic scans may not immediately point to the root cause, requiring technicians to follow the specific diagnostic steps outlined in TSB 94 21 44 2059217/2.

Technical Background

The underlying cause of the intermittent hazard light activation or inability to switch them off is a malfunction within the multifunction switch assembly. This component is designed to detect input from various switches, including the hazard switch. However, due to an internal fault, the assembly can incorrectly register an input from the hazard switch, leading to unintended activation of the hazard warning lights. Audi has implemented an improved switch assembly in production to prevent this issue in newer vehicles.

Repair Procedure Summary

For the 2021 Audi Q8 hazard lights activate concern, the repair process involves a specific diagnostic and replacement procedure. First, the technician must confirm the customer's reported issue by reviewing the vehicle's battery history data. This data can provide evidence if the hazard lights were actuated during a period when the vehicle was stationary. If the timing of the battery history data aligns with the customer's concern, or if the issue can be replicated during service, the multifunction switch containing the hazard switch should be replaced. This direct replacement addresses the faulty component responsible for the incorrect input detection.

Required Parts and Tools

To perform the repair outlined in TSB 94 21 44 2059217/2, technicians will need the following parts:

• Multiple Switch: Quantity 01 (Part number to be determined via ETKA)
• Fasteners, Bolts, Nuts, and Screws: As needed per the Repair Manual (Part numbers to be determined via ETKA)

Technicians should always consult their Parts Department and/or ETKA (Electronic Parts Catalog) for the latest information and specific part numbers before ordering.

Warranty Information

This repair is covered under Audi's warranty program, provided the vehicle meets specific criteria. The applicable claim types are:

• Claim Type 110: For vehicles up to 48 Months/50,000 Miles.
• Claim Type G10: For Audi Certified Pre-Owned (CPO) vehicles, requiring owner verification.

The service number for this operation is 9447, with a damage code of 0010. The labor operation for