Genuine OEM Volkswagen Coolant Hose With Coupling, part number 5Q0121086D. This hose is designed to carry engine coolant, facilitating its circulation through the cooling system to regulate engine temperature. The integrated coupling ensures a secure and leak-free connection to other cooling system components. It is a critical part of maintaining optimal engine operating temperatures. Weighing 0.2275 kg, this hose is engineered for specific routing and pressure. Choosing genuine OEM ensures the correct material composition, heat resistance, and coupling design for reliable, leak-proof performance under varying engine conditions.