Genuine OEM Audi transmission output flange, part number 0AZ311807. This component serves as the connection point for the drivetrain, transferring power from the transmission to the axle assembly. It is marked as number 17 in the provided assembly diagram. Genuine OEM flanges are manufactured to precise tolerances to ensure a vibration-free connection and to maintain the integrity of the transmission oil seal, preventing leaks and premature wear.