Five problems related to gasoline fuel system 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.
I attempted to merge onto the expressway and after pushing the gas pedal the van suddenly accelerated beyond my control. I eased off the pedal and the van continued to serge ahead with no way for me to stop or slow it down as the brakes would not work. I saw the rpm reach level 6 and speed increase to 70 in seconds but as it was the expressway, I was able to keep my distance from cars in front of me. I switched the lever to the neutral position and the van slowed down and then I went back to drive and it roared back up to 70 mph with the rpm again at 6 and I tried turning the cruise control on and then braking to see if it would shut down the gas but no luck. I went back and forth from d to n for about 2 minutes and then on one of the movements from n to d it shut down back to normal. I dropped the van off at my Toyota dealer the next day and am waiting to see what "headquarters " decides.
On my 2004 Toyota Sienna minivan the rear hatchback gas struts have failed. This is a dangerous situation that could easily get a small child killed. I almost had this happen when my 5 year old was helping to get groceries out while I was holding the gate open it slipped and came crashing down. Luckily he had just moved and it missed him. These gas struts are a recall item on the power operated lift gates, why aren't they on the manual ones. And the cost of replacements is terrible, $180/ea. [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).
After opening and closing the fuel cap door on the 2004 Sienna causes the driver side sliding door to intermittently jam and not open. This has happened several times in the past 2 years. To fix, one must squeeze hand into door crack and push down the lever that is stopping the door from sliding. Sometimes this jam causes the door to not close.
Gas leaking.
Check engine light comes on with every gas fill. (gas cap is closed tightly) is very difficult to fuel. I have to find a pump that pumps very slowly or do it by hand. Updated 01-15-08. Updated.