Originally Posted by Brad Sims

I have a 2010 G37x with about 65,000 miles. It has stock 17" wheels and fairly good tires. Over the last few months, I have been experiencing a significant vibration at speeds over 40 mph. Since I can feel it in the steering wheel, I am assuming it is something in the front end. Also, I am almost positive it is something on the passenger side because when I turn to the left, I can hear and feel the vibration a lot more. Originally, I thought it was a wheel out of balance, so I took it to a tire shop and they informed me that my front passenger side rim was bent. I bought a new rim and had the same shop put it on for me, but unfortunately the problem persisted. I then thought it might be the tire, so I swapped the front and rear wheels, but the problem remained exactly the same.

It doesn't seem like it is a bad wheel bearing because I haven't heard any grinding and with it being such low mileage, I would be very surprised if a hub already needed replaced.

I have read through a lot of the threads about similar issues on here, but it seems that most of them ended up being related to tires, but (assuming the tire shop knew what the were doing) my case seems to be something else. Any suggestions would be greatly appreciated. Thanks!