The hum in the back right was getting louder. I bought this assembly in the Autoround on Revain. Took the old one off after about an hour and knocked the old one off. I hope your car hasn't been on the road with a lot of "fyi" salt. But this build fits my 2012 Buick Lacrosse perfectly and the noise is gone. Also, it was $40 cheaper than what I bought from Advanced Auto. I would definitely buy another if I had to replace one.