I am submitting this complaint because I have experienced serious safety-related concerns involving Audi vehicles, and I am extremely concerned that these issues could result in a serious accident, injury, or loss of life. My personal vehicle is a **2024 Audi Q3**, which has experienced safety-related problems involving the braking system, wheel/speed sensors, parking recognition system, and other related vehicle safety and driver-assistance systems. I also want to report a separate and extremely serious incident involving an **Audi loaner vehicle that was provided to me by the Audi dealership while my 2024 Audi Q3 was being repaired**. While I was driving the Audi loaner vehicle, **the wheel/wheel assembly came off the vehicle while it was in motion**. This was an extremely dangerous situation that could have resulted in a catastrophic accident, serious injury, or death. The loaner Audi has a different VIN from my 2024 Audi Q3. I do not currently have that VIN available, but the dealership should have records identifying the exact loaner vehicle that was assigned to me while my Q3 was being repaired. I am reporting both situations because I believe these safety concerns need to be properly documented and investigated. A wheel coming off a vehicle while it is being driven, along with the braking, wheel/sensor, parking-recognition, and related safety concerns I have experienced with my own Audi, raises very serious concerns for me. I do not want another driver or family to exp