Great advice and steps from bfurth. The only thing I would change is replace the bearings in pairs. Depending on age and vehicle mileage, if one is going, might as well do the other side while you're at it.
My 2012 has 115k miles and my bearings are definitely going bad. The make the winding noise as I drive faster...and get louder when I turn either direction at slow speeds.
Another check is to raise your front end of the ground and do a wiggle test with the tires still on. See if there's any play side-to-side or up and down. There shouldn't be any play with good bearings.
Oh, and FYI for anyone looking for it, it is under the alternator, you can get to it without taking off the alt, but be VERY careful that you don't drop the bolt. When I put my bolt back in, I used electrical tape, and taped it on the socket, just enough to hold it, got it threaded, then pulled the socket off, and finished tightening it up.
Ok, my bad......I think, so I went to take the new one out and take it back, when I went to put the original in, it slipped right in, and I thought that was odd, so I pulled it back out, and there was no O ring on it, I thought great, it fell down somewhere, then I looked at the jew one I just took out and there were two O rings on it, took one off, put it back in, and so far so good.