Those bearings come in a bearing carrier. Removing the bearing usually breaks the carrier. The hub unit with the bearing pressed in comes all together and they're quite expensive. That is what you would replace. All four wheels is going to be almost $1000 worth of wheel bearings, not counting labor. Be sure the noise isn't from tread-separated tires. That car is awful young to need wheel bearings. I've seen Toyotas with over 200,000 miles that never had wheel bearing problems. See if the shop will loan 4 wheels to road test so you can tell if the tires are noisy from being worn out. Tread separation may not show on the outside of the tire.