I bought a used sienna and a few weeks later was hearing a tapping under the hood when i got up to 55mph and when the wind is gusty. We noticed when we bought the van, in the wheel area the plastic was broke from the screw but that was okay with us. A year later I brought it in for an oil change and they showed me where something was ran over and shoved the under plastic piece up in the engine area. The tapping was where it hit and broke off the piece holding the external temp reader which was dangling creating the tapping. It also was the reason for the broke plastic from the bolt. The front brakes were wore down to nothing. They blamed me, saying I ran over something and told me if I heard a tapping I didn't do anything for 9,000 miles and a year later. I was not the only person who heard it so even if I did wait, it was already broke when we bought it and 6 months ago when the tires were rotated they didn't say anything (you can only see the obvious damage when its on a lift, their words.) They also didn't say anything about the brakes. It wasn't until I asked for it to be checked out did they address it. They had all the answers, saying the tapping was not the hanging temp reader but the fender well flapping. If I hit something I would at least know I did it but I know It was already in this condition when I got it. They said my extended warranty doesn't cover any of this because its my fault. I will never come back to them for anything and when maintenance is due I will take it to a Toyota dealer they don't own.