Genuine OEM Volkswagen Coolant Hose, part number 2H0121051B. This shaped rubber hose is an essential component of the engine cooling system, responsible for transporting coolant between various engine components and the radiator. It ensures efficient heat dissipation and maintains optimal engine operating temperature. Weighing 0.4 kg, this hose is designed to withstand high temperatures and pressures. Genuine OEM hoses provide the correct routing geometry, material composition, and resistance to coolant chemicals for long-term reliability and leak-free operation.