Genuine OEM Volkswagen Gearbox Sealing Ring, part number 09D321181A. This O-ring is a vital component designed to create a fluid-tight seal, often used around cable entry points or other interfaces within the gearbox assembly. Its primary function is to prevent the leakage of transmission fluid and to protect internal components from dirt and moisture ingress. Made from durable, oil-resistant rubber, it ensures long-term sealing performance. Using a genuine OEM sealing ring guarantees the correct material composition and precise dimensions for a reliable, leak-free seal, crucial for the longevity of the transmission.