Genuine OEM Mazda Right Rear Door B Pillar Garnish, part number GBFT50M30. This garnish is an exterior trim piece located on the right rear door, adjacent to the B-pillar. Its function is to provide a finished aesthetic appearance to the door frame and to help seal the door against wind and water. The part is situated on the right rear door. Genuine OEM ensures an exact fit, correct color matching, and durable material for a seamless integration with the vehicle's body.