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fairly significant
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
17,250 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2004 Toyota Sienna fuel system problems

fuel system problem

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2004 Toyota Sienna Owner Comments

problem #4

Feb 032010


  • 10,000 miles


I wrote to Toyota Sept. 7, 2007, concerning an acceleration problem with my 2004 Sienna minivan, following many visits to the dealer to evaluate and fix it. The throttle response is delayed, in my case; it lags during initial acceleration from a stop, but more importantly, it lags when immediate acceleration is needed for passing, and accelerating after slowing for a turn. The factory rep who responded to my letter said the dealer would reevaluate the problem. The dealer rep drove the van, experienced the same problem, and concluded it was a "quirk" of the car, that could not be fixed unless, perhaps, the computer controlling the throttle was replaced. They would not do that unless a recall was ordered, he said. Needless to say, I thought that was the final word, until other problems began to surface with the "fly by wire" system in Toyota. I do believe that the electronic throttle, the throttle position feedback circuit, and related sensors are at fault, all of which are controlled by the computer. I also have other cars with electronic throttles, an Accord and a Town & Country, and neither has that problem. No accidents have been caused by this daily malfunction, as I guess I have adapted my driving style to it, but don't you think there is a systemic problem here? the incident date is a continuing date, beginning during the first year of ownership (2004) up to the present time.

- Bay Village, OH, USA

problem #3

Jan 282010


  • 1,000 miles
I own a 2004 Toyota Sienna. I have had issues with a sluggish accelerator that suddenly "gives". I have taken it to the dealer and independent mechanics and neither have resolved the issue. I have documentation of repairs, cleaning the fuel injectors, removing the carpets, etc. Nothing has worked and am worried why the Sienna has not been included in the recall.

- Jacksonville, FL, USA

problem #2

Nov 012009


  • miles
I purchased a 2004 Toyota Sienna le in 2003. The date that I was to pick up the brand new van I was informed of a recall. When I pick up the van I was told that the recall concerning the gas tank was made. Now, the gas tank is linking, what should I do now.

- Houston, TX, USA

problem #1

Oct 012008


  • 58,000 miles
The power sliding door on my 2004 Toyota Sienna van has become inoperable. I have been stranded with a door 'stuck open'. this is clearly a safety issue. Toyota originally quoted over $1400 to repair what is clearly a design flaw given the 100's of other complaints I've seen online.

- Los Gatos, CA, USA

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