 Overall I'm happy with our Siennna. It only has 19,000 miles after 6 years, so it doesn't get a lot of use.  There's an issue with the check engine light. It goes on and we take it to the dealership and they find nothing wrong. I wouldn't care too much, but the engine detects something wrong with the emission control and because of this, the car fails the state emissions test. We take it to the dealership, they run a smoke test and everything is OK. We go back for the emissions test, we fail, but since we had the car smoke tested, we get a pass for the next couple of years.  We also had to replace the front tires. For some unknown reason, they wouldn't hold air.