2002 Nissan Maxima

If the wobble occurs when you are doing normal driving, i.E, not during braking, then the cause is most likely out of balanced tires, or worn out tires that have flat spot or uneven wear. Get your tires balanced and try again.

If the wobble occurs while you are stepping on the brake, then one or both of your front disk brakes are warped. The solution is to get those disks machined or replaced.

Rare occasion would be a loose wheel nut or loose main drive shaft nut (that single large nut in the center of your tire. It could also be caused by bad bearing or bad ball joint.