Washer pump grommet. 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 Windshield Washer Fluid Pump. A3, W/E-TRON. A3, W/O E-TRON. Headlight Washer Pump Grommet . S3. W/O R. W/R. Washer pump,grommet. Windshield Washer Pump Grommet . gasket. Headlight. Ing ring. Windshield.