pretty bad
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
2,880 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 engine problems

engine problem

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2004 Toyota Sienna Owner Comments

problem #6

Mar 102010

Sienna 6-cyl

  • miles


2004 Toyota Sienna steering problem the consumer stated the dealer fixed the steering problem. However, the consumer had to return the vehicle because the problem resurfaced. The steering was never the same. There were times when the steering would become stiff, but the problem would go away once the vehicle warmed up. The consumer also stated the clip that holds the floor mat in place comes off easily.

- Unknown, DC, USA

problem #5

Nov 132004

Sienna 6-cyl

  • Automatic transmission
  • 9,500 miles
When attempting to accelerate after braking/slowing down there is a period of several seconds with no response from the throttle and then suddenly the vehicle jerks hard and accelerates. When merging into traffic this can pose a serious safety issue. The Toyota dealer advises this is a normal condition as the vehicle "drives by wire" and has no mechanical throttle linkage. This vehicle didn't have this issue when we purchased it. This problem developed after we had driven it for a while and has progressivly gotten worse. Other manufacturers also use the drive by wire components and do not have this problem I find it hard to believe that Toyota considers this a normal condition.

- Boca Raton, FL, USA

problem #4

Aug 202004

Sienna 6-cyl

  • Automatic transmission
  • 900 miles
On two separate occasions vehicle hesitated when applying the accelerator pedal from a stop position. Vehicle taken to the dealer on two separate occasions, and they were unable to duplicate the problem.

- Virginia Beach, VA, USA

problem #3

Aug 122004

Sienna 6-cyl

  • Automatic transmission
  • 700 miles


Accelerator fails to respond for 1-2 seconds in an emergency acceleration situation. When entering a road from a stop sign, I hesitated thinking there was no room. A vehicle let me in. When I hit the accelerator to make it safely, the vehicle failed to respond for 1-2 seconds. The car letting me slowed down to let me in, but not enough to allow for this delay and he nearly rear-ended me. It was scary to not have the car respond. I have seen many other complaints filed about this and the dealer response always seems to be that this is how the electronic throttle control performs. I believe this needs to be recalled so that Toyota can make this electronic device respond immediately as opposed to taking 1-2 seconds.

- Shrewsbury, MA, USA

problem #2

May 042004

Sienna 6-cyl

  • Automatic transmission
  • 6,150 miles
I ran into a big problem with my 4 month old 2004 Toyota Sienna xle. I was turning onto a hill and wanted to see how it would accelerate up the hill so I floored it. The car accelerated well and I took my foot off the gas pedal at about 35 mph. The problem was that the car kept going at full acceleration. There was no one in front of me so I started trying to figure out how to stop it instead of just turning off the car (I needed to get to the top of the hill and I could coast to where I was going). I put it into neutral but all it did was rev to 6000 RPM, I checked to make sure I somehow hadn't gotten the cruise control on and I hadn't, I downshifted into 3rd and kept pressing on and letting off the brake pedal since I didn't want ruin my breaks (I was able to keep the speed between 40 and 50). As I neared the top of the hill (it is about 1/3 of a mile long) I figured I would turn the car off at the top. Just as I was about to crest the hill, the van stopped accelerating as the car leveled out and then ran normal. There is an initial level portion going to the top of the hill and the van did not stop accelerating at the level spot. It wasn't until the second level spot that it stopped accelerating..

- Pocatello, ID, USA

problem #1

Jan 282004


  • Automatic transmission
  • 30 miles
Distances between the gas and brake pedals were designed poorly. The pedal pad was 2X4 inches. When transferring feet from one pedal to another consumer's foot would get stuck between the pedals.

- Danville, VA, USA

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