2020 AUDI SQ5 Service Brakes Problems

The contact owns a 2020 Audi SQ5. The contact stated while reversing in her driveway, the automatic braking system activated and the vehicle stopped abruptly. The contact stated that there was a vehicle at a stop sign 500 ft. away from her vehicle when the failure occurred. The contact shifted the vehicle into park. There was no warning light illuminated. The contact stated that the failure reoccurred while reversing and while driving from a complete stop. Additionally, the contact stated that the vehicle was making an abnormal sound while depressing the brake pedal. The vehicle was taken to the local dealer approximately 3-4 times however, the mechanic diagnosed that no issues were found. The vehicle was not repaired. The contact notified the manufacturer and inquired about buy back. The contact was awaiting a call back from the manufacturer. The failure mileage was approximately 150.