This means that if the timing belt breaks, the valves will not collide with the pistons. While this is good news, it doesn't mean you should ignore a broken timing belt. It will still cause serious engine damage.
It's important to note that:
* The 2002 Mazda 626 was the last year for this model.
* Mazda discontinued the 626 and replaced it with the Mazda 6.
If you're looking for information about the Mazda 6, you'll need to specify the year.