Genuine OEM Audi Engine Coolant Flange, part number 038121133J. This component serves as a crucial connection point for coolant hoses within the engine cooling system, directing coolant flow to various engine parts. It is typically mounted on the engine block or cylinder head. Weighing approximately 0.26 kg, this flange is made from robust material to withstand thermal cycling and pressure. Using a genuine OEM coolant flange ensures precise dimensions, proper sealing surfaces, and resistance to warping, preventing coolant leaks and maintaining cooling system integrity.