Looked through the old posts and nothing. Is an 07 with the 3.5L an interference engine or not? Asking as wife's car now has over 100,000 miles on it and am assuming the timing belt may need to be changed. Also, if you have had the timing belt changed, how much did they charge? Last time I had it done was on a Toyota 4runner, but I also had the water pump changed at the same time. Was over $800, but I lived in Alaska at the time.