Changing fan belt on vw transporter?

To change the fan belt on a VW Transporter, first ensure the engine is off and cool. Loosen the tensioner pulley to relieve tension on the belt, then remove the old belt from the pulleys. Install the new belt according to the routing diagram, ensuring it's seated correctly on all pulleys. Finally, adjust the tensioner to apply proper tension to the new belt before securing everything back in place.