Genuine OEM Volkswagen Auxiliary Coolant Radiator, part number 5Q0121251HH. This component supplements the main cooling system, providing additional heat dissipation capacity for the engine coolant. It is crucial for maintaining optimal engine temperatures under demanding conditions or in vehicles with higher performance requirements. Weighing 4.232 kg, this radiator is engineered for efficient heat exchange and durability. Choosing a genuine OEM auxiliary radiator ensures precise integration, reliable performance, and the necessary cooling support to prevent engine overheating.