My steering wheel shimmies when at highway speeds. If I go around a fairly sharp curve, the shimmy stops, or eases up. If I go around a curve in the opposite direction, it starts again. If I change cruise speeds, it will start again. I bought it last May, with only 51k miles on it. The dealer had put new Firestones on it. I took it back to them to check balance and alignment, which were deemed okay. I have the stock rims on it, so the rotor washer thing shouldn't apply to it.