I purchased a certified 2012 IS 350 AWD in May. During the test drive, I noticed a vibration while driving. The dealer balanced the tires, said it road tested fine and I bought the car. It was my mistake not road testing the car again. Since then, there is a "seat of the pants" vibration at 35-40 mph and 70-80 mph. At other speeds it seems to lessen or go away. I had the tires road force balanced twice. I moved the rear tires to the front. Nothing changed and the vibration did not move to the steering wheel. No improvement. The dealer could not find anything wrong. I'll be going back there again soon. Has anyone had similar issues? Are there drivetrain or CV/axle issues common to this model? This car should ride better for the price. I had a 2002 WRX for 13 years and it rode much smoother. This should not be the case. Thanks for any help.
