Genuine OEM Volkswagen Coolant Hose, part number 7E0121073AK. This hose transports coolant to and from the engine to prevent overheating. It is located in the engine cooling system assembly, specifically at position 30 on the diagram. The hose has dimensions of 0.225 m length, 0.105 m width, and 0.045 m height, weighing 0.156 kg. Genuine OEM coolant hoses are constructed from durable materials designed to withstand high temperatures and pressures, ensuring reliable coolant circulation.