My vehicle displays the anti-skid light when brakes are applied. I also hear a chirping noise and brake pump activation noise when the vehicle’s brakes are utilized and as the vehicle is stopped. Information on the internet indicates this is a serious issue with the Prius Gen III brake system, requiring replacement of the hydraulic brake booster and pump. This brake failure should not be happening, and Toyota has already identified this problem. This Prius has been trouble free up to this point and has ~185,000 miles.