Genuine OEM Volkswagen Engine Coolant Hose, part number 3C0121156BB. This hose is responsible for circulating engine coolant, playing a vital role in maintaining optimal engine operating temperatures. It features a quick-release coupling for efficient and secure connections within the cooling system. Weighing 0.309 kg, this hose is constructed from materials resistant to heat and coolant chemicals. Choosing a genuine OEM coolant hose ensures the correct routing geometry, pressure resistance, and material compatibility, preventing leaks and ensuring the longevity of the cooling system.