It’s an interference engine and Gates says to inspect the timing belt at 60,000 miles and replace no matter what at 80,000 miles. Your owner’s manual should tell you when to replace the timing belt based on time. Given the mileage requirement, I would guess it is 6 to 7 years. If the timing belt needs to be removed to replace the water pump, replace the pump at the same time. While the serpentine belt is off, you might as well replace it, too.