Genuine OEM Audi Radial Shaft O-Ring, part number 01V409133A. This O-ring is designed to create a critical, leak-proof seal around a rotating shaft, preventing the escape of fluids or ingress of contaminants. It is typically found in assemblies with moving parts requiring a dynamic seal. Made from a durable, flexible green elastomer, it weighs only 0.01 kg. Using a genuine OEM O-ring ensures the correct material composition, precise dimensions, and optimal elasticity for a reliable seal, crucial for preventing leaks and protecting internal components.