I am reporting a serious braking system defect in my 2024 Audi Q3, which has persisted despite six separate repair attempts at an authorized Audi dealership. The defect causes severe vibration and pulsation in the steering wheel, brake pedal, and vehicle floor while braking at highway speeds, excessive brake noise coming from the rear brakes causes severe vibration, and the vehicle pulling to one side when braking, increasing the risk of loss of control and crash. These issues compromise braking performance and overall vehicle safety, making the vehicle hazardous to operate. Despite multiple repair attempts, including replacing the front brakes, the issue persists, indicating an unresolved defect in the rear braking system or a systemic problem with the braking components whereby an underlying issue. Audis technical support was involved in diagnosing the issue but failed to resolve the problem. Given that similar brake-related defects have led to numerous NHTSA recalls in other Audi models, I am concerned that this could be part of a larger pattern. This defect poses a serious safety risk to the driver, passengers, and other road users. I have documented my case with video evidence, repair orders confirming the ongoing complaints, email correspondence with the dealership, and an independent inspection report validating that the braking system is not functioning properly. Despite all this, Audi has been unable to remedy the defect. I urge NHTSA to investigate whether other 2024 Audi Q3 owners are experiencing similar braking issues, determine if this defect is related to previously issued Audi brake recalls, and assess whether this issue warrants a recall to prevent potential accidents. Given that this braking defect has not been resolved despite repeated repair attempts, further investigation is necessary before this defect leads to a serious accident. This issue has remained unresolved, and I request that NHTSA take immediate action to ensure consumer safety.