Adjust motor seal. FROM 12/06. Left.W/O HID LAMPS. Right.W/O HID LAMPS. A circular disk covered in rubber or plastic with a hole in the center where the edge is sometimes tensioned by a spring that prevents fluid from leaking at the Headlamp Motor. A seal that prevents oil from leaking out, or contaminants from entering the Headlamp Motor. Included in headlamp assembly. ASSEMBLY gasket. O -. WASHER. Included with: Headlamp assembly.