Keep the cooling system in your 2003-2004 Dodge 5.9L Diesel functioning properly with a high-quality replacement water pump. Shop water pumps from top name manufacturers such as Dayco, Alliant Power, Bullet Proof Diesel, Bostech, and many more! Replace or service your water pump to ensure that your engine's cooling system is functioning properly. Many factors like corrosion, leaking gaskets, or failing pulleys reduces the efficiency of the factory water pump on your vehicle. Shop XDP today and find the water pump you need.