Genuine OEM Audi Engine Coolant Pipe with Hose, part number 4K0145638A. This component is vital for the engine's cooling system, designed to carry engine coolant to various parts of the engine and radiator to regulate operating temperature. It consists of a rigid pipe section integrated with a flexible hose, allowing for connection and movement within the engine bay. The assembly measures approximately 0.23 meters in length, 0.145 meters in width, and 0.07 meters in height. Opting for a genuine OEM coolant pipe and hose ensures correct material resistance to heat and coolant chemicals, precise routing, and leak-free connections, which are crucial for preventing engine overheating and maintaining system pressure.