Audi Q8

Whenever the physical brakes are engaged during daily "brake cleaning" during the first mile of driving, or whenever the regenerative brakes do not engage, or when the physical brakes are engaged under heaving braking where the regenerative braking system's braking capacity is exceeded, the vehicle shudders as the brakes grip and slip. When inspected by Audi of Mendham, the service technician noted the rotors were "warped" and had "debris build-up". Despite the vehicle performing daily "brake cleaning", the build-up has remained. Despite normal use of the vehicle over the past 22,000 miles over two years, the rotor have warped causing inconsistent brake pressure to be applied. Under heavy braking where the regenerative system is exceeded, this could cause the vehicle to swerve due to uneven brake pressure being applied across the four wheels.

1. Failed/Malfunctioned Component: March 2025 - Air Conditioning (A/C) control valve, May 2025 - A/C line and seals. 2. Safety Risk: I heard an explosion underneath the vehicle shortly after parking the vehicle in a shopping center. Upon quick inspection, I did not initially observe any obvious broken parts, components, nor any warning lamps, messages or symptoms. The following day while charging the vehicle in my garage, I noticed a fluid leak emitting from under the vehicle. The fluid was identified as R1234YF refrigerant, which is flammable. The risk of that fluid igniting is even greater while the vehicle is charging. 3. The problem was reproduced by the dealer under both incidents (A/C control valve failure & A/C lines and seals explosion) and confirmed as a manufacturer defect. 4. The vehicle was inspected, serviced, and repaired at an authorized dealership on two occasions. 5. Warning lamps, messages, or other symptoms? Symptom in first instance was failure to blow cold air. Symptoms in second incident - fluid leak was detected, shortly after turning on the vehicle A/C failed to blow old air.

Our Audiu Q8 has had a host of safety issues since purchased in December 2023 and we have been denied or delayed on a buyback twice. The vehicle has been unable to be moved 3 times due to battery (12V and relay) issues that left my wife and [XXX] stranded at home. On one occasion the vehicle could not be moved by the tow service whatsoever. The charging system cable (known to cause fire hazard by Audi with open safety bulletins) created a fire in our 240 outlet box and also melted the plug and connected cable. The vehicle also continues to read road signs on exit ramps and hard brake check almost causing accidents while driving on the highway with cruise control. The feature for traffic sign recognition is tuned off but the vehicle continues to do this hard and sudden brake checking. Audi continues to drag their feet on repairs and still has not reimbursed us for electrical expenses from the fire damage over 6 weeks later. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Front passenger door doesn’t always open when using the inside door handle. When you pull the door handle the door partially unlatches not allowing the door to open. You must then release the door handle and then repull the handle for the door totally unlatch and open. I was told by the dealership that these electric door latch’s are poorly designed. Cars been in the dealership 6 times for this in the past 2 months and it’s still not fixed.

Driving at 70 mph car lost power to wheels and coasted to stop. No response from accelerator. Battery was charged about 60%

I have two Q8 Etron, and this q8 is also having the same issue as my other q8. When the windows are open half way, and the driver is trying to close the window because the car is moving faster speed, the window automatically retracts and opens the window even lower. this is really distracting to the driver especially when there is a safety hazard on the road or the weather. please address this issue to improve safety of the vehicle

From the first day I purchase the vehicle, even when the sales person was walking me through the vehicle, the vehicle window was constantly retracting itself lower when i tried to close it. When the window is half way open, and the driver is trying to close the window, the window automatically retracts and lowers the window. causing distraction for the driver and safety hazards from the road and environmental conditions.

While operating my 2024 Audi Q8 e-tron at 30 mph, I attempted to slow the vehicle to make a turn. Upon pressing the brake pedal, the regenerative braking system failed to engage properly, and the expected deceleration did not occur. The brake pedal felt very soft and the vehicle continued to move forward with nearly no braking force, despite significant pressure being applied to the pedal. The failure appears to be a total malfunction of the 'brake blending' system—the critical handover between the electric regenerative system and the hydraulic friction brakes. Even as a secondary safety measure, the hydraulic brakes failed to provide adequate stopping power. This resulted in a significantly extended deceleration distance that nearly caused a collision. No warning lights appeared on the dashboard prior to this event, making the failure sudden and unpredictable. Please note that this happened shortly after driving 10 miles on a very hilly road and extensively using paddle shifters while driving downhill to force battery charging. The breaks continued to have issues for the next 2h of driving and didn't work as expected for about 60% of the time. The next day, I tried driving short distance and was not able reproduce the problem. This happened on March 21, 2026 between hours of 2 and 4pm.