ON 2 SEPARATE OCCASIONS MY CAR'S AUTOMATIC COLLISION MITIGATION SYSTEM HAS ENGAGED WITHOUT NOTICE AND ANY REASON. THERE WAS NOTHING IN FRONT OF MY CAR AND THE CAR BRAKED SUDDENLY WHILE I WAS DRIVING 45 MPH. THE LAST TIME THIS HAPPENED I WAS THROWN FORWARD AND BACK WITH A JERK. SINCE THEN I'VE BEEN EXPERIENCING LOWER NECK AND SHOULDER PAIN. I DISENGAGED THE COLLISION MITIGATION SYSTEM AND WILL TAKE THE CAR INTO THE DEALERSHIP FOR DIAGNOSIS.