Genuine OEM Audi Axle Flange Seal, part number 02Q409189A. This component is a critical sealing ring designed to prevent fluid leakage from the axle flange. It is typically installed at the front axle. Constructed from durable rubber and metal, it measures approximately 0.072m in diameter. Using a genuine OEM seal ensures a precise fit and the correct material properties to withstand operating temperatures and pressures, preventing fluid loss and contamination of critical drivetrain components.