Sienna is only available as a
Sienna is only available as a hybrid. Some folks keep their Siennas for 15 years. Hybrid batteries will probably die sometime after 10 years causing the vehicle owners to shell out $6000-$8000 to replace them if they want to keep the vehicle. That doesn't sound like a good choice. A friend of mine had to recently make this choice with his RX hybrid at 10 years. He chose to get rid of it despite it being in great shape otherwise because he couldn't justify putting $8000 into a 10-year-old vehicle. It's too bad Toyota is not providing Sienna buyers with a naturally aspirated engine option.