Two problems related to automatic transmission control module have been reported for the 2004 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Toyota Sienna based on all problems reported for the 2004 Sienna.
: the contact stated the vehicle hesitated while pulling out of a parking lot with the accelerator depressed. The vehicle was driven to the dealer who determined the transmission control did not operate correctly. The consumer stated there is a 2-3 second delay in acceleration. When the transmission does activate, it seems to search for a gear and when a gear s found it is usually a low gear which causes the vehicle to lurch into traffic. Updated 10/04/06.
2004 Toyota Sienna le. Vehicle hesitates when acceleration. There is a big delay before the car gains speed. This is a on going problem. Dealer states that the car was made that way and there is nothing that they can do to correct the problem. This hesitation can cause an accident at any time.