VEHICLE WAS STOP AT RED LIGHT ,VEHICLE WAS HIT IN REAR, SEABELT DID NOT LOCK, CAUSING PASSENGER TO HIT HEAD IN WINDSHIELD. DRIVER HIT STEERING WHEEL. BOTH SEATS COLLAPSED. FRAME CAME APART, SEATS RECLINED ALL THE WAY TO BACK SEAT. BACK END OF VEHICLE PUSHED UP TO MIDDLE ROW, THIS DEFECT CAN CAUSE SERIOUS INJURIES. *AK