Front Upper. Left.AWD. Right.AWD. Top nut. W/DYNAMIC CHASSIS CONTROL. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Active Suspension Air Spring. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Differential Housing Support. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Engine Torque Strut. Bumper Impact Bar Nut. Nut that secures Suspension Stabilizer Bar Bracket. Part cannot be reused/reinstalled. Seat Belt Lap and Shoulder Belt Nut. Suspension Shock Absorber Mount Nut. Suspension Strut Mount Nut. Windshield Wiper Arm Nut.