Ever since I bought my car six months ago, it has done this. I took it to the dealer and they informed me that I had a bad steering gearbox with the following note: "Road tested vehicle, felt excessive play at the left and right 'full' turn positions. Estimate to replace steering box is $2,673.46" I was going to have this done but the idea about wheel weight sounds good too... The previous owner took the car to a "quickie" tire change place to have the wheels balanced--as a result I have different looking wheel weights...
Would the difference in appearance cause it? BTW I'm running Michelin MXV4's on the car.