Genuine OEM Audi Coolant Hose O-Ring, part number WHT004094. This critical sealing component is designed to create a tight, leak-proof seal within the coolant hose pipe connections, preventing fluid loss and maintaining proper engine cooling. Made from high-quality, heat-resistant rubber, this O-ring ensures durability and reliable performance under varying engine temperatures and pressures. Using genuine OEM gaskets and seals is vital for maintaining the integrity of fluid systems, preventing costly leaks and ensuring long-term vehicle reliability.