Genuine OEM Audi Engine Coolant Bypass Hose Seal, part number 07L103121R. This critical rubber seal ensures a tight, leak-free connection for the engine coolant bypass hose, preventing coolant loss and maintaining system pressure. A properly sealed cooling system is vital for engine temperature regulation. It is typically positioned at the rear right of the engine assembly, sealing the bypass hose connection. Made from high-grade, heat-resistant rubber, it offers excellent durability and resistance to coolant chemicals. Using a genuine OEM seal guarantees precise dimensions and material quality for optimal sealing performance.