Jack up 1 side and remove the wheel. Grab the hub and check it for lateral play. There shouldn't be any at all. If it wiggles, the bearing is shot or the spindle nut might be loose. Spindle nut being loose is highly unlikely but you never know. Also a good idea before performing the check is to push the caliper piston in a bit. This gives you clearance around the brake pads which otherwise might throw off your test. Check both sides this way and if bad, you'll need a new bearing, spindlenut and anti-seize compound for the bearing OD and ID.
