Genuine OEM Volkswagen Coolant Hose with Coupling, part number 5Q0122157DJ. This hose is an integral part of the engine cooling system, designed to transport coolant to maintain optimal engine operating temperatures. It features an integrated quick-release coupling for secure and efficient connection within the cooling circuit. Constructed from durable, heat-resistant materials, this hose ensures a reliable and leak-proof flow of coolant. Using genuine OEM hoses guarantees precise fitment, correct routing, and material integrity for long-term performance and resistance to engine bay conditions.