One problem related to battery dead 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.
2006 Toyota Sienna limited van (34,000 miles) with automatic rear and sliding doors. 1 month ago right rear sliding door stopped opening when using manual door latch. If you manually unlatch door, you must manually open it about one third before motor kicks in to open it fully. Works ok using overhead console button and when using fob buttons. Took van to Toyota dealer on 2/28/11. They could not duplicate problem. Went to pick van up on 3/1/11. Sliding door again not working. They kept van several more hours for troubleshooting. Problem remains. They said there is no fix for this problem but they did send in a technical report to Toyota. After checking out and finally getting ready to leave dealer the van would not start. The battery had died. Dealer replaced battery. After that and for 2 more days, the sliding door worked ok. On morning of third day, the sliding door problem returned. Still will not open automatically using manual door latch.