One problem related to starter has been reported for the 1999 Toyota Sienna. The most recently reported issues are listed below.
I am the first owner of the 1999 Toyota Sienna le with which has only 61,000 miles so far. However, in the evening of two days ago, I started it and couldn't stop it anymore. It kept running even I took the key out. I was so afraid of causing fire eventually, but I still had to drive around trying to stop it. Eventually I smelt something burning and I was able to stop it from running. The car was towed to Toyota dealer in dublin, CA to have the starter replaced. This is scary problem for the car I bought in the belief of safety and reliability.