really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
68,000 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.

2003 Toyota Sienna fuel system problems

fuel system problem

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2003 Toyota Sienna Owner Comments

problem #4

Jul 072009

Sienna 6-cyl

  • 97,000 miles


The Toyota Sienna's gas pedal has been and remains intermittently sticky. It takes some foot stomping to depress the gas pedal in order to accelerate the vehicle. Toyota does not believe this to be a major problem when I questioned them a few years ago.

- San Antonio, TX, USA

problem #3

Jan 102010


  • 14,000 miles
I turns my Toyota Sienna into a driveway of a storage facility and placed the vehicle into park while trafficpassed by as this road was also the exit road from costco. When it was safe from other vehicles and is was safe to back out of the driveway I took the vehicle out of park and suddenly the vehicle lurched forward ramming into an iron gate bending it wide open. The vehicle continued through the gate even though I turned off the ignition, jammed my brakes an tried to place it into park all to no avail. Continuing through the gate I was able to reach a large open area whereupon I turned the steering wheel as hard as I could to make sure the vehicle would only circle. After a bit of time the engine roared pickup speed then stopped. This same surge occurred on several occasions but I thought I did something to cause this problem.

- Trabuco Canyon , CA, USA

problem #2

May 012009


  • 94,000 miles
I have owned a 2003 Toyota Sienna since new. I had a extended 100K warranty on this vehicle. At 80,000 miles a check engine light came on, it was replaced, at 82,000 miles it came on again and was replaced., then at 94,000 miles the car started stalling and would not crank for several minutes, the dealer told me that it was in my head, nothing was wrong, it continued to do this more often, at 94,400 I told it back and the idiots told me the same thing, I fought with this condition until it final effected the accelerator, the car revved up wide open and continued until I got it to the dealer while it was doing the revving without touching the gas pedal, they finally repaired the value. I wrote to Toyota and told them and they said it was not of there concern, idiots knew there is a problem and would not fix it, but 800 dollars later they did and not under the warranty. Those people need to be held accountable for hiding all the concerns, I want me repair money back and plan on causing enough crap with the news media until I do.

- Plymouth, NH, USA

problem #1

Sep 222008


  • 67,000 miles
Unintended high speed acceleration I was accelerating to merge onto the highway and I briefly used the brakes to allow a large truck to go past before merging. I'm not sure if I then put my foot on the accelerator or the brake, but the 2003 Toyota Sienna began acceleration on its own as though the cruise control had been set at 100 mph and it was trying to get there! I did not have the cruise control on at the time. I then put on the brakes to reduce my speed, and I was able to reduce the speed but the brakes were definitely fighting against the vehicle's desire to go 100 mph. I pulled the car off at the next exit and was unsure of the best way to stop the vehicle. My 2 kids were in the back seat and my daughter was saying she was very scared. I continued to apply the brakes and pulled over. I turned the ignition off while the van was still moving just to get it to stop. After 5-10 seconds I turned the car on again and the engine was still revving at a high RPM. I turned it off again, waited a while longer, and when I turned it on again the van behaved normally. I fear that in a different situation this could have resulted in a serious accident or injury. If anyone had be in front of me and I had needed to stop quickly, I would have been unable to stop. My mechanic checked out the car yesterday and found nothing wrong. His guess is that the cruise control actuator did not function properly. I read about other similar incidents involving unintended acceleration with Toyota Siennas. This is a serious problem that needs immediate attention.

- Colorado Springs, CO, USA

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