I was surprised to find out that the Honda 3.5 6-cyl engine has a timing belt, while the Honda 2.0 4-cyl has a timing chain. You would think that it would be the other way around! We replaced the timing belt on our 2004 Odyssey at 65,000 which is what Honda recommended at the time, and again at 120,000 miles. The second time we had the belt replaced, our service rep told me that Honda had changed the recommended interval from 65,000 to 95,000 miles on the newer Honda engines. Sorry to hear that you had to replace your engine because of the belt failure. I agree that it is unusual for a new OEM belt would fail like that.