2021-2022 Audi Q8 Unjustified ABS/ESC Intervention

Audi has released Technical Service Bulletin (TSB) 2063793/1, also known as PSS 45, to inform owners and technicians about an issue affecting 2021-2022 Audi Q8 vehicles. This bulletin specifically concerns instances of unjustified ABS/ESC intervention during certain driving conditions.

The TSB, dated June 28, 2021, acknowledges that a solution for this condition is currently under development. It provides guidance on how to handle customer reports of the issue while awaiting a permanent fix.

Symptoms

Owners of affected Audi Q8 models may notice the Anti-lock Braking System (ABS) and Electronic Stability Control (ESC) systems activating unexpectedly. This Audi Q8 ABS/ESC intervention typically occurs when driving around a corner at low speeds, such as when exiting a highway. The intervention may feel like the brakes are being applied or the vehicle's stability control is engaging without a clear reason.

Fault Codes / DTCs

According to TSB 2063793/1, no diagnostic trouble codes (DTCs) are stored in the ABS/ESC control module, J104 (address word 0003), when this condition occurs. This means that standard diagnostic scans will not reveal any specific fault codes related to the unjustified ABS/ESC intervention.

Technical Background and Trigger Conditions

Audi explains that the ABS/ESC regulation in the Q8 is configured for a sensitive response. This sensitivity can lead to the systems intervening in situations where ABS pump activation occurs, even though the safety of the vehicle is not compromised. Certain vehicle configurations and conditions may make the Audi Q8 ABS/ESC intervention more noticeable or frequent.

Vehicles equipped with air suspension, rear steering, summer tires, and wheels larger than 20 inches may be more susceptible to experiencing this issue. These factors can influence how the ABS/ESC system interprets driving dynamics, leading to the unjustified activation.

Important Warnings for Owners

Audi has provided specific instructions for this condition, emphasizing that no immediate repairs are necessary. The TSB states: "If there are no irregularities detected on the vehicle, do not perform any further repairs or replace any components for this condition since this will not resolve the customer's concern." It further advises: "Explain to the customer that a solution is forthcoming for the 3rd quarter of 2022 and that no repairs are necessary at this point."

This means owners should not seek out or authorize any repairs or component replacements for this specific issue, as they will not resolve the problem and may incur unnecessary costs. A permanent solution is being developed by Audi.

Manufacturer's Update

Audi has confirmed that a production solution for the unjustified ABS/ESC intervention is currently under development. The company anticipates that this solution will be available by the third quarter of 2022. The TSB will be updated once more information regarding the fix is available.

What Owners Should Do

If you own a 2021-2022 Audi Q8 and experience unjustified ABS/ESC intervention, you should be aware that Audi is actively working on a solution. Since no repairs are currently available or recommended, you can contact your authorized Audi dealer to report the concern. Mentioning Technical Service Bulletin 2063793/1 (PSS 45) will help ensure your dealer is aware of the specific issue and its current status.

NHTSA ID: 10198483