I called Toyota a little while ago with this question: What is the interval for changing the timing belt? It's the wrong question of course since it is a timing belt and not a chain. In spite of that, I was given the standard answer of 90,000 miles or 6 years. I ain't buying that. Has anyone been able to get an official and realistic answer to this question from Toyota? If not, what are your suggestions? I have 115,000 miles on my 2004 and want to believe I don't need to change the chain. Hell, I'm still running on the original brakes.