One problem related to battery has been reported for the 2006 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Toyota Sienna based on all problems reported for the 2006 Sienna.
The passenger side door (automatic) does not close. It will attempt to close itself but will stop just before closing. The door will pause for 1-2 seconds and then re-open and stay in the open position. Multiple attempts have the same effect. Disconnecting the battery does not resolve the problem.