first off look to see whats wrong then determinate if its a hub or not.
jack the car up, one wheel at a time, leave the lugs tight. then grab the top and bottom of the tire, do a push pull with each hand. watch the rotor where it meets the caliper, if its moving you see it there.
just tested my d/s front today, its moving a lot now. it used to just have a 1/8 inch nudge in movement.
if the hubs feel tight, then take each tire off and unplug each hub, all 4, clean the plugs, di electrical grease them, work them off and on a few times. also check the wires to that plug, as they cant get damaged.
this is all free to look at and figure out what maybe wrong.
if all of this seems good, go have the cars scanned as you just wind up tossing money at it. dont know what year you got, but some newer cars will show a abs code on the free scanner at AZ. older cars need a shop to scan it, and they will charge you most of the time.