Genuine OEM Audi Turbocharger O-Ring Seal, part number 4M0145119. This O-ring is designed to create a tight seal at turbocharger connections, preventing air or fluid leaks and ensuring optimal boost pressure. It is positioned at critical interfaces within the turbocharger system. With a diameter of approximately 0.065 meters, this small but vital component provides a precise fit. Opting for a genuine OEM O-ring guarantees the correct material composition and heat resistance required for the high-temperature, high-pressure environment of the turbocharger, ensuring reliable sealing.