How do you replace the serpentine belt on a 2001 jaguar stype?

To replace the serpentine belt on a 2001 Jaguar S-Type, first, ensure the engine is off and cool. Use a wrench to relieve tension on the serpentine belt tensioner, then carefully slide the old belt off the pulleys. Route the new belt according to the belt routing diagram usually found on a sticker in the engine compartment, ensuring it sits properly on all pulleys. Finally, release the tensioner to apply tension to the new belt, double-checking its alignment before starting the engine.