How do you change alternator belt on lancer?

To change the alternator belt on a Mitsubishi Lancer, first ensure the engine is off and cool. Loosen the tensioner pulley by turning its bolt, then remove the old belt by sliding it off the alternator and other pulleys. Place the new belt around the pulleys, ensuring it is aligned correctly, and then re-tighten the tensioner to apply proper tension on the new belt. Finally, double-check the alignment and tension before starting the engine.