2024 Audi Q3

The vehicle’s Adaptive Cruise Control (ACC) system intermittently fails to detect vehicles directly ahead at lower speeds. When this occurs, the car maintains the set speed instead of slowing down, creating a potential collision risk. The issue has been present since the vehicle was new and has occurred repeatedly over a two-year period. Specifically, while driving in moderate or heavy traffic using ACC or Adaptive Cruise Assist, the system occasionally does not recognize a slower or stopped vehicle ahead. The car continues to accelerate or maintain speed until I manually apply the brakes. Once I brake and re-engage the ACC, the system immediately detects the vehicle ahead and resumes normal following behavior. This pattern strongly suggests a software or sensor logic fault rather than driver error. There are no visible warnings, messages, or malfunction indicators before or during the failure. The problem has been reproducible multiple times under similar conditions. The local Audi dealership has been informed, but as of now no official fix, recall, or service bulletin has been issued for this behavior on the 2024 Audi Q3. To my knowledge, the manufacturer has not publicly acknowledged the problem. This malfunction poses a significant safety hazard, as it can result in the vehicle failing to decelerate in time to avoid a rear-end collision if the driver does not intervene quickly. Component or system involved: Adaptive Cruise Control / Adaptive Cruise Assist (Radar-based driver assist system). Availability for inspection: The system remains installed and can be inspected upon request.