In June 2009, I bought a used 2008 Toyota Sienna CE with only 25K miles on it from a local dealership. As of today, November 26, 2010, the van has 37K miles on it and I have had 3 flat tires. I replaced the 2 front tires at 29K miles and replaced the rear tires at 36K miles (high mileage quality tires). When I replaced the rear tires, the mechanic questioned if I would like to replace the front tires because they looked worn. I told the mechanic there was only 8K miles on the front tires!!! He then told me that Toyota Sienna's eat front tires due to a front-end design flaw. He suggested I rotate tires often and expect to replace tire my tires often (like every 30K miles). Who can afford that? It's one thing to have a defective part on a vehicle, it's another thing to have a design defect that the consumer ends up paying for. To my knowledge Toyota claims no fault. I am going to trade it ASAP.