Genuine OEM Volkswagen O-Ring, part number WHT007923. This toroidal seal is used to prevent leaks or drafts around turbocharger components. It is located at position 23 in the diagram. This O-ring has a diameter of 0.01 m and a thickness of 0.002 m. Genuine OEM O-rings for turbochargers are made from high-temperature resistant materials to ensure a reliable seal under extreme operating conditions.