How do you replace idler tensioner pully on Mazda tribute 2002?

To replace the idler tensioner pulley on a 2002 Mazda Tribute, first, disconnect the negative battery terminal for safety. Then, locate the idler pulley, loosen the tensioner by using a wrench on the tensioner bolt, and remove the serpentine belt from the pulley. Remove the mounting bolts of the idler pulley, replace it with the new pulley, and reassemble by reversing the steps, ensuring the serpentine belt is properly aligned before reconnecting the battery.