This product is a genuine Volkswagen/Audi radiator with the part number 5Q0121251HA. It is a high-quality replacement part for vehicles from these brands. The radiator is responsible for cooling the engine by circulating coolant through its tubes and fins, dissipating heat from the engine. This specific radiator is designed and manufactured by Volkswagen/Audi to meet their strict quality standards and specifications, ensuring optimal performance and durability. It is a direct fit for the original radiator and is compatible with various VW and Audi models.