Two problems related to speed control cable 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.
Nhtsa recall number 13v429, mfr recall number d0r is listed on the safecar. Gov web site for my VIN number as being an incomplete recall, but the Toyota servco service center says they have already fixed this recall on my car. I had an incident recently that was traced to the gear shift cable bushing. The car was parked in a grocery store parking lot, put into park, ignition turned off, and then started to roll backward, the brake didn't work to stop the rolling since the ignition was off, luckily the parking brake was applied to stop the rolling before any damage was done, it was a very gradual slope. I see that the later 2014 model Sienna has a recall for the gear shift cable, but my year does not have a recall for this problem so I had to pay ~ $600 to get this fixed. Luckily no one was hurt and no property was damaged.
There is a distinct delay in the acceleration of my 2004 Toyota Sienna van when the accelerator pedal is depressed quickly. This delay is not noticeable unless the driver is already moving and the accelerator is depressed in situations such as passing or some other activity that requires quick acceleration. I was trying to speed up while driving in the right hand lane of a highway because the left lane was already occupied and a vehicle was attempting to merge onto the roadway. My van did not speed up until it was too late and the vehicle attempting to merge onto the highway drove off of the road to avoid an accident. During another occasion requiring quick acceleration a truck locked up its' brakes to avoid hitting me from behind when I merged into his lane as I depressed the accelerator only to have the van fail to speed up for two seconds. Toyota personnel from the dealership where I purchased the van (world Toyota of chamblee, GA) informed me that they have received similar complaints but they are unable to correct the problem because it is the result of a design flaw in the vehicle in that Toyota installed a laser control on the accelerator in lieu of an accelerator cable that could be adjusted.