really awful
Crashes / Fires:
1 / 1
Injuries / Deaths:
0 / 0
Average Mileage:
6,100 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.

2010 Toyota Sienna engine problems

engine problem

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2010 Toyota Sienna Owner Comments

problem #4

Aug 202011

Sienna 6-cyl

  • 16,800 miles


My wife was returning home with her 2011 Toyota Sienna van. She pulled into the driveway, took her foot of the gas and put on the brake but the van accelerated right into my 2011 Ford Fusion, causing a lot of damage. I won't know exactly how much until the body shop calls me tomorrow. Of course I know the Sienna wasn't even on Toyota's recall, but I have seen many reports of the same problem on line. My wife is now afraid to drive the vehicle and we don't know what to do?

- Cedar Hill, TX, USA

problem #3

Mar 292010

Sienna 6-cyl

  • Automatic transmission
  • 100 miles
Subject: Smoke from new 2010 Toyota Sienna ce. I bought what appeared to be a new 2010 Toyota Sienna from dch brunswick Toyota in North brunswick, New Jersey on March 29, 2010. Its odometer read 95 miles. We left the dealership at about 7:00 pm. My wife drove the car and my mother, who is suffering from sciatica and has recently undergone an operation, sat in the passenger seat. (it must be mentioned here that both my wife and mother have extensive experience in driving cars that goes back at least ten years, and my wife especially is quite familiar with the basics of car mechanics.) at about 7:30 pm, when my wife turned the heater on, the engine started making loud thumping sounds. My mother noticed a glow in the hood. A considerable amount of thick dark smoke started rising from the hood. My wife stopped the car immediately and turned the engine off. Thinking that the engine was about to explode, they leaped out of the car and ran away to a safe distance in the mud on the side of the street fearing for their lives. The physical and emotional trauma that my mother was subjected to has caused a substantial increase in the back pain leading to nightmares and insomnia. The smoke that the car continued to emit for another half an hour gave the impression that the engine could explode any time. We called the dealership and they had to tow the car back to their place. The dealerships service center tried to diagnose the problem. The best they came up with was: A possible air bubble in the coolant and thermostat failure. But it could be anything else, they added. Updated 04/13/10.

- Neshanic Station, NJ, USA

problem #2

Mar 282010


  • 4,500 miles
The contact owns a 2010 Toyota Sienna. While driving at approximately 5 mph, the vehicle suddenly stopped and all the lights on the instrument panel illuminated. The steering wheel also locked up so the contact turned the vehicle off. Upon re-starting the vehicle, the failure reoccurred. A tow truck was called and a police officer was also at the scene. The tow truck driver noticed smoke emitting from under the hood of the vehicle upon arrival. The vehicle was towed to an authorized dealer. The vehicle had not been repaired at the time of the complaint. The current and failure mileages were approximately 4,500.

- Bronx, NY, USA

problem #1

Jan 012010


  • 3,000 miles
Engine speed control, it doesn't go up smoothly from 0 klm to 55 klm when going into highway.

- Avon, IN, USA

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