Function and benefits This radiator expansion tank acts as the coolant reservoir, helping maintain proper coolant level and system pressure, reducing the risk of overflow and air entering the cooling system. Easy installation and compatibility Direct replacement for the factory radiator expansion tank. Installs using the vehicle's original hardware; simply remove the old reservoir and install this unit. Durability and material Made from durable material designed to withstand engine heat and pressure for reliable longterm use. Design and handling Professional, practical design with a clean appearance. Compact and easy to handle during installation. Size and fit Designed to fit standard radiator systems and the factory tank with compatible connections and plugs. Please verify compatibility with your vehicle model to ensure a precise fit. Use scenarios Scenario 1: Replacing a worn or cracked factory radiator expansion tank during routine coolant system service. Scenario 2: Performing radiator or cooling system upgrades where a direct OEMsize reservoir is required for proper capacity and fit. Scenario 3: In vehicles with coolant demand or heavyduty use (towing, frequent stopandgo driving) to help maintain coolant level and system pressure.