The most recently reported issues are listed below.
Toyota sienna key fob battery dead.
Also please check out the statistics and reliability analysis of toyota sienna based on all problems reported for the sienna.
A bunch of manufacturers have a backup system built into the start button to allow a car with a dead key fob to start that way i believe your toyota is one of them rich.
Try using the key fob itself to push the start button touch them together.
A small battery will be housed under the green microchip and should be easy to pop out and replace.
Look towards the bottom of your key fob for a small button that will release the inner key which you can pull out and use on your vehicle like a traditional key.
To change the battery in your toyota key fob take the metal key outside of the fob and then use the opening left behind to gently pry the fob open.
How to unlock and start your toyota with a dead smart key toyota smart key fobs house a mechanical key to help you get inside of your vehicle when the smart key stops working.
Pop the old.
Other cars have another spot where you can touch the dead key fob that allows the car to.
Energizer battery cr2032 https amzn to 2decuq6 here is a quick little video showing you how to replace the dead cr2032 battery in the toyota sienna sma.
Inside you will find a small green circuit board that houses the small battery.