Genuine OEM Audi Engine Coolant Pipe, part number 03G121065G. This pipe is an integral part of the engine's cooling system, designed to transport coolant between various components like the engine block, radiator, and heater core. The diagram indicates its position within the engine assembly, connecting directly to the engine block. Constructed from robust materials to withstand engine temperatures and pressures, it weighs approximately 0.57 kg. Using a genuine OEM coolant pipe guarantees correct dimensions, material integrity, and secure connections, which are crucial for preventing leaks and maintaining the engine's optimal operating temperature.