This has plagued me from day one of owning the car:

While driving, particularly down the interstate, the car will be extremely smooth, unless I use a right steering input. The more right I turn, the stronger the vibration. The faster I go, the stronger the vibration. It's not a strong or violent vibration, more of a buzz. Certainly a high-speed vibration. It feels as if it's coming from the right front wheel.

I'm on my 3rd set of tires, 5th alignment, and I've swapped the wheels from either side. I have factory 18" wheels on a 2007 IS250. The car has been to 3 different dealerships and none of them wanted to fix it, when it was under warranty. One dealership even told me, "That's how these cars drive."

Any ideas on this? I've looked at the right front suspension components and noticed nothing out of the ordinary. The brake discs have been replaced as well. My only remaining thought is the wheel bearing.

 

How many miles? It could be the wheel bearing but if that's the case, might as well change out the wheel hub assembly.

 

I'm around 65,000 miles right now.

 

I'm experiencing the same problem. The more I turn the stronger the vibration. Doesn't matter which direction I steer. Did you ever figure out what this could be? I have an 08 IS350 with 40K miles.

 

I've still not figured out the problem, but I'm thinking of replacing the wheel hub. At $300, they're a bit pricey.

 

Sounds like a wheel bearing to me.

 

Well, I just ordered a new hub assembly from Sewell and I'll publish the results in this thread when I install it.

 

Let us know how it turns out! Good luck!

 

The new wheel hub install was quite easy and it fixed the problem! It's like a whole new car on the interstate now. The hub was expensive, but probably one of the easiest items I've ever installed. All you need is a 17mm socket and a torque wrench.