Genuine OEM Volkswagen Cylinder Head Connector Union, part number 03H127065A. This small but vital component serves as a connector or adapter for various lines, such as coolant or vacuum hoses, on the engine's cylinder head. It ensures a secure and leak-free connection between engine components. Made from durable metal and featuring an integrated O-ring for sealing, it weighs approximately 0.027 kg. Using a genuine OEM union guarantees precise dimensions, correct material composition, and reliable sealing, preventing leaks and maintaining optimal engine performance and longevity.