How do you change the alternator belt on a clio 172 sport?

To change the alternator belt on a Clio 172 Sport, first ensure the engine is off and cool. Remove the engine cover and loosen the tensioner pulley by turning the adjustment bolt to release tension on the belt. Carefully remove the old belt, then route the new belt around the pulleys according to the diagram typically found on the engine bay. Finally, re-tighten the tensioner and replace the engine cover.