I have the front wheel drive also, haven't heard any noises and have 6000 mi on it. Check tire wear or wheel bearings on the rear. Try rotating tires to see if the noise follows the tire rotation could be a bad tire. Just rotate front to back on both sides. Good luck!
Try the most easy free, or at least cheapest diagnosis you can do on your own or ask your dealer if they can rotate them and check rear bearings. Very well could just be a bad tire.