How do you change both belts on an 2004 FX35?

To change both belts on a 2004 FX35, first, ensure the engine is off and cool. Remove the engine cover, then use a socket to release tension on the serpentine belt tensioner and slide the belt off the pulleys. For the timing belt, you’ll need to access the front of the engine and may require removing additional components; ensure to align the timing marks when installing the new belt. Finally, reassemble everything, double-checking the tension and alignment of both belts.