How do you replace idler pulley on a 2003 dodge neon?

To replace the idler pulley on a 2003 Dodge Neon, first, ensure the engine is off and cool. Remove the serpentine belt by loosening the tensioner pulley with a wrench. Next, unbolt the idler pulley from its mounting bracket using the appropriate socket. Finally, install the new idler pulley, reattach the serpentine belt, and ensure everything is secure before starting the engine.