What 2 owners told NHTSA about the 2023 Audi Audi Q8

There is a pulsating/fluttering noise coming from the rear passenger side near side of the vehicle. Got the vehicle in July of 2023 and reported the issue in August. Dealership confirmed and performed TSB 2067759/2 (Installed 10 rubber insulator sleeves). This did not fix the problem. I noticed it is loudest when the fuel tank is low. It can be heard at idle but tends to get louder while moving slow at slow speeds (forward or reverse). The tank was full when I brought it in for the August service. Went back in October when I realized it is significantly louder when the fuel is low. Dealership replaced the activated charcoal filter pipe and the fuel tank. This did not eliminate the problem.

NHTSA ODI 11565426

This is a loaner Audi Q8 from Molly Audi of Kansas City. My 2023 Audi Q7 is in the shop for this exact same issue. The brake pedal randomly does not respond. This prevents the vehicle from being able to start, shift out of gear when parked, and the rear brake lights do not respond. My main concern is the brake lights not responding. I do not want to be injured in a collision when slowing down on the road. There were no warning lamps or massages from the vehicle. The dash just kept telling me to "Please press the brake pedal to start the vehicle". (my foot was on the brake) I have a video of this occurrence if needed.

NHTSA ODI 11538953