Rear Right. Right.DISC BRAKES. Splash shield. A backing Plates used on a drum Brake Braking system, used to contain Brake shoe dust, as well as protect the Brake drum components from water, dirt and debris. A shield used to contain the Brake dust produced by the Brake pads of a vehicle's disc Brake calipers. This typically is mounted to the vehicle's wheel hub. Additionally, it functions as a splash guard to protect a vehicle's disc Brake rotors from water, dirt and debris. Dust Shield. Splash Guard. SUB - Assembly, Park. Backing. Hinge. Parking.