How do you refit the alternator belt on your Citroen Xsara?

To refit the alternator belt on your Citroën Xsara, first, ensure the engine is off and cool. Loosen the tensioner pulley by turning it counterclockwise to relieve tension on the belt, then remove the old belt. Position the new belt according to the routing diagram, ensuring it sits correctly on all pulleys. Finally, re-tighten the tensioner to apply proper tension to the belt, and check for correct installation before starting the engine.