How do you replace the alternator belt on Mazda miata?

To replace the alternator belt on a Mazda Miata, first, ensure the engine is off and cool. Remove the plastic cover if applicable, then loosen the tensioner bolt and the alternator mounting bolts to relieve tension on the belt. Slide the old belt off the alternator and pulleys, then install the new belt, ensuring it's properly seated. Finally, tighten the alternator and tensioner bolts to restore tension, and check the belt alignment before replacing any covers.