Impact bar bolt. Left.2017-19. Right.2017-19. W/300 SPORT. W/LANDMARK. W/XE S. A threaded rod with a drive head (such as hex, 12 point, torx, etc) on one end used to secure the Differential Housing to it's Mounting point. Bumper Impact Bar Bolt. Part cannot be reused/reinstalled. HEXAGONAL H. Bracket. Bumper Impact Bar. Housing.