Genuine OEM Audi transmission oil seal, part number 09E409400E. This seal is designed to prevent transmission fluid leakage at the shaft interface, protecting internal drivetrain components from contamination and ensuring optimal lubrication levels. It is manufactured to precise tolerances to maintain a tight seal under varying rotational speeds and thermal conditions. Genuine OEM seals are critical for transmission longevity, providing the exact material elasticity and lip geometry required to prevent leaks and maintain system integrity.