The Nissens Engine Oil Cooler - 90903 is a product used in automotive engines to cool down the engine oil, ensuring optimal performance and longevity of the engine. It is a high-quality component made from durable materials and designed to withstand high temperatures and pressures. The oil cooler works by circulating the engine oil through a series of tubes, which are in contact with the outside air, allowing the heat to dissipate and cool down the oil. This product is essential for maintaining the proper functioning of the engine and preventing overheating, which can lead to engine damage. It is suitable for use in a wide range of vehicles and is a reliable and efficient solution for keeping the engine oil at the right temperature.