I have a 2006 ES 350 with about 45K miles. For the last 10K miles, the steering wheel shakes severely when I brake at Highway speed - 60mph plus. I have taken it to the dealership twice and they blamed it on the brake rotors needing turned, but said they weren't worn enough to justify. The second time, they said the shimmy was "insignificant". I said they didn't drive it because the steering wheel literally shakes in your hands. Has anyone else experienced this problem? Thanks.