Replace the drain plug in your 2003-2004 Dodge 5.9L Diesel with new Oil Drain Plugs & Valves. Aftermarket oil drain valves are available for a wide range of applications and make for a simple and clean oil change process that requiring less cleanup with just the touch of a lever. A standard thread-in drain plug can become damaged, rounded, or stripped making it difficult to remove, or can also cause oil leaks. In most cases a drain plug is fairly inexpensive and is simple to replace during preventative maintenance. You'll find top brands like EZ Oil Drain, Fumoto, Mishimoto, and Dorman available.