Timing belt for an 02 saturn sc2?

Maintenance/Repairs
1

I am looking to get into this type of car,

when should the timing belt be replaced.

It has an 16 valve inline 4 cyl.

2

It has a timing chain, not a belt.

3

I agree, it’s a chain and the only time I know that you have to change a chain is when there’s so much play in it that the timing will wander. On most cars, this happens after many, many thousands of miles, perhaps the life of the car.