THIS IS THE SECOND TIME THAT I PRESSED THE BRAKES AND THE CAR FAILED TO STOP. BOTH TIMES RESULTED IN COLLISIONS. THE FIRST TIME THE CAR WSS REPAIRED AND THEN GIVEN BACK TO ME. THIS TIME I WAS TRAVELING APPROX 45 MPH AND THE PERSON IN FRONT OF ME SLAMMED ON THEIR BRAKES. I WENT TO DO THE SAME AND THE BRAKE PEDAL WENT TO THE FLOOR WITHOUT STOPPING THE CAR AT ALL. I COLLIDED WITH THE CAR IN FRONT OF ME CAUSING MAJOR DAMAGE TO MY CAR AND INJURIES TO MY SHOULDER, NECK AND BACK.