Well, I tried searching the forum, but couldn't find anything. The back right tire is making a humming sound, I replaced the tires about a week ago and the noise is still there. I think it might be a bearing, but I'm not too sure what part I'll have to order.

Any ideas on what might be wrong, and what part I'll have to replace?

 

Jack up the car so that tire is not touching the ground. Spin the tire by hand and see if there is any noise. Any noise at all from the bearing is a fail, it will get much louder with the weight of the car on it. Also try to wobble the wheel from side to side.

Most older models used a cartridge bearing assembly where you replace the whole hub and bearing as a unit, I would think the '07 is the same but you could go to a parts site and look it up.