I’m concerned that so many others are experiencing the same problem I have. I purchased a 2007 Qwest with all the upgrades at CarMax and immediately began having the shaking problem. I replaced the entire brake system, rotors and pads, both lower control arms and two engine mounts. At the same time, I purchased the Michelin 90k warranty tires. None of this worked. I had the front end re-balanced and the tires rotated 3 times – no change. I went back and claimed warranty and had the Michelin tires replaced with brand new again…did I mention I also purchased 4 brand new OEM wheels as well. NONE of this has eliminated the steering wheel shaking at highway speeds. Is there an answer to this problem out there anywhere?