Genuine OEM Audi Engine Coolant Tube, part number 07L121455J. This essential component is part of the engine cooling system, responsible for carrying coolant to and from various engine components to maintain optimal operating temperatures. It is specifically designed for the left side of the engine assembly. The tube measures approximately 0.162m in length and weighs 0.0495 kg. Using a genuine OEM coolant tube ensures correct routing geometry, material resistance to engine coolant, and secure, leak-free connections, which are vital for preventing overheating and maintaining engine health.