Genuine OEM Volkswagen Coolant Hose With Coupling, part number 3QF121157E. This hose is designed for efficient coolant transfer within the engine's cooling system and features a quick-release coupling for simplified installation and removal. Its function is to ensure a secure and leak-free connection for coolant circulation. This part is located at position 25 in the cooling system diagram. Weighing 0.053 kg, it is engineered for precise fitment. Genuine OEM hoses with couplings provide the reliability and ease of use necessary for maintaining the cooling system's performance.