How do you change fan belt on 206 peugeot 1.6cc 2003?

To change the fan belt on a 2003 Peugeot 206 1.6cc, first, disconnect the negative battery terminal for safety. Loosen the tensioner pulley by turning the adjusting bolt and remove the old belt. Route the new belt according to the belt diagram, ensuring it's properly seated on all pulleys. Finally, re-tighten the tensioner, double-check the belt's alignment, and reconnect the battery.