Genuine OEM Volkswagen Rear Cross Panel Bung, part number WHT010733. This bung is used to seal openings in the vehicle body, such as the rear cross panel, preventing ingress of dirt and moisture. It is indicated at position 1 in the diagram. The bung has a diameter of approximately 27mm and a height of 10mm. Genuine OEM bungs are manufactured to precise specifications to ensure a perfect fit and effective sealing.