I have a 2005 g35 sedan with 168k. RWD. I have a hum and vibration at around 50mph from the front right wheel. I thought is was the hub bearing, which is kind of strange since I replaced both front hub bearings when I did the struts, strut mounts, etc, at 150k about 2.5 years ago. Two hours and $250 later I still have the hum and vibration at 50mph. My next step will be tire rotation to see if the problem moves, but I'm wondering if anyone has any other ideas. Brakes are Hawk Ceramics, and have very little wear, and no rub.

Check in after wheel rotation - that'll reveal a lot.

I have a hum coming from the back. I know it's not the tires, I just replaced them. I was also thinking bearing or perhaps differential bushing.