Should you change the timing belt on a 2005 Lexus rx330 by age or mileage.?

For a 2005 Lexus RX330, it's recommended to change the timing belt based on both age and mileage. The typical interval for this model is around 90,000 to 100,000 miles, but if the vehicle is older and has not had the timing belt replaced, it's wise to do so regardless of mileage. Additionally, if the vehicle is over 10 years old, it's prudent to consider age as a factor, as rubber components can degrade over time. Regular maintenance is crucial to prevent potential engine damage.