Changing alternator belt on Fiat cinquecento?

To change the alternator belt on a Fiat Cinquecento, first ensure the engine is off and cool. Loosen the tensioner bolt and remove the belt from the alternator pulley. Install the new belt by routing it around the pulleys as per the belt diagram, then adjust the tensioner to ensure proper tightness. Finally, double-check the alignment and tension before starting the engine.