Genuine OEM Audi Engine Coolant Pipe, part number 4K0145931F. This essential component is part of the vehicle's engine cooling system, designed to transport engine coolant between various components like the radiator, engine block, and heater core. It ensures efficient heat dissipation and maintains the engine at its optimal operating temperature. The pipe measures approximately 1.16 meters in length and weighs about 0.41 kg. Choosing a genuine OEM coolant pipe guarantees the correct material composition for heat and chemical resistance, precise routing geometry to prevent kinks or chafing, and durable connections for a leak-free cooling system.