Genuine OEM Audi External Engine Coolant Pipe, part number 8K0145931D. This rigid pipe is designed to route coolant outside the engine block, connecting various components within the cooling system. It is typically found on the left side of the engine assembly. Genuine OEM coolant pipes are manufactured from durable, corrosion-resistant materials, ensuring precise fitment and a leak-free connection for optimal cooling system integrity and longevity.