How do you replace a serpentine belt in a 2004 jeep wrangler?

To replace the serpentine belt in a 2004 Jeep Wrangler, first, ensure the engine is off and cool. Locate the belt routing diagram, often found on a sticker near the radiator or inside the engine bay. Use a wrench or ratchet to relieve tension on the tensioner pulley, then remove the old belt. Install the new belt according to the routing diagram, ensuring it sits properly on all pulleys, then release the tensioner to secure the belt in place.