definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
33,362 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.

2005 Toyota Sienna engine problems

engine problem

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2005 Toyota Sienna Owner Comments

problem #3

Apr 012010

Sienna 6-cyl

  • Automatic transmission
  • 90,000 miles


Will someone please call me asap. My Toyota Sienna suddenly accelerated last week in des moines, ia. Toyota is saying that Sienna's are not under recall. I was traveling with my husband and two children. The brakes could not stop the vehicle, nor did shifting it into neutral, park, or reverse. The only thing that worked was pulling the key from the ignition at about 75 miles per hour. The Toyota Sienna is a time bomb. The sudden acceleration of my Sienna has happened at least two other times. Toyota is claiming that the floor mats caused it, but my husband and I checked the floor mats, they were not the problem. Toyota wants us to come get the van but it's not safe. From NHTSA web site. Updated 05/24/10 updated 03/09/11 updated 06/23/14

- Lone Tree, IA, USA

problem #2

Jun 302005

Sienna 6-cyl

  • Automatic transmission
  • 4,585 miles
Contact owns a 2005 Toyota Sienna. The vehicle has severe hesitation, almost impossible to drive the vehicle on a wet road or on a snowy road. Gas pedal and transmission do not seem to connect. No crashes. No police reports. No fires. The vehicle has been to Toyota dealer 5 times; the mechanic came back and said they found nothing wrong with vehicle. (11/08/05) the transmission would down shift very harsh on turns and on hills. The service dealer placed an upgraded computer in the vehicle but the problem worsened.

- Hampton , TN, USA

problem #1

May 162005

Sienna 6-cyl

  • Automatic transmission
  • 5,500 miles
Owner of 2005 Toyota Sienna le minivan purchased in December 2004. 1. noticed that this problem started to occur over the last two months and the occurrence has increased in frequency. 2. description of problem: When depressing the accelerator pedal to accelerate from a stop, the throttle will occasionally fail to respond to the initial pressure being applied to the pedal. Continuing to depress, or applying additional pressure to, the accelerator pedal will eventually cause the throttle on the engine to engage and this results in an unanticipated surge in engine output and acceleration. My concern is that this unanticipated engine surge and acceleration could lead to and/or cause a traffic accident. 3. brought this problem/issue to the attention of the service department at lombard Toyota (lombard, Illinois). Spoke with two different service writers at lombard Toyota and they both mentioned that this was a known issue by both Toyota and the dealership. Lombard Toyota mentioned that they are currently unable to do anything to correct this problem/issue at this time.

- Plainfield, IL, USA

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