Genuine OEM Volvo Turbocharger O-Ring, part number 30640823. This O-ring is essential for providing a proper seal within the turbocharger assembly. It ensures that the boost pressure generated by the turbo is contained, contributing to efficient engine performance and preventing leaks. The diagram shows this O-ring (labeled 22) fitted to the turbocharger inlet. Genuine OEM parts offer the precise material and dimensional accuracy required for reliable turbocharger operation.