definitely annoying
Crashes / Fires:
0 / 2
Injuries / Deaths:
0 / 0
Average Mileage:
45,651 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 #8

Apr 062012

Sienna 6-cyl

  • miles


A/C went out April 2012. Blows hot air. According to online forums this happens a lot in Sienna's - 2004 to 2006 models. We have 5 children in the vehicle and cannot take them very far even with the windows down or they could possibly get heatstroke. They are sweated wet by the time we get from point a to point B. we open all windows and the rear ones that only open 2 inches as well. Forum link where I found this info (same issue as our Sienna) is www.toyotafans.net/2004-Sienna-ac-problems-T2523-ST20.htm -the seat belts in our Sienna lock up, found the recall on this site so will be taking it to the dealer for that. Not just the middle row seat belts though. It is rear seatbelts as well as front driver and passenger seat belts. -the tail light works when it decides to. Sometimes it is off so we get pulled over - until the police officer taps it, and it decides to come back on. On a side note - the left speaker system does not function either unless it wants to. Same as the tail light. One minute it is off (most of the time) and the next minute the sound is blaring.

- Coconut Creek, FL, USA

problem #7

Apr 062012


  • 67,000 miles
The contact owns a 2005 Toyota Sienna. The contact stated that while having the vehicle serviced, the mechanic noticed that the radiator was leaking. The radiator caused the vehicle to stall and overheat due to loss of fluid. The contact took the vehicle to a dealer and the dealer stated that the radiator needed to be replaced. The radiator was replaced at the contact's expense. The failure mileage was 67,000.

- Bismarck, ND, USA

problem #6

Feb 152011

Sienna 6-cyl

  • Automatic transmission
  • 112,000 miles
The contact owns a 2005 Toyota Sienna. The contact stated that noises were heard from the dashboard. The noise had not caused any problems with the vehicle. The vehicle was taken to the dealer, but the dealer was unable to determine what caused the noise. The failure mileage was 112,000 and the current mileage was 136,420. Updated 4/2/12

- Takoma Park, MD, USA

problem #5

Dec 152004


  • 500 miles


The engine speeds up briefly on its own causing vehicle to briefly speed up. It usually lasts only a few seconds.

- Oceanside, CA, USA

problem #4

Jan 012009


  • 100,000 miles
The contact owns a 2005 Toyota Sienna. The contact stated that both the driver and passenger side doors were inoperable. The keyless entry would not operate and she could only enter the vehicle manually. The contact had to manipulate the lock entry in order to enter and exit the vehicle by holding the manual lock in place while closing and/or opening the door. The radiator was also in need of repair. No repairs have been performed. The VIN was unknown. The failure and current mileages were over 100,000.

- Aberdeen, MS, USA

problem #3

Dec 212008


  • 45,311 miles
Vehicle caught fire spontaneously during normal use. Fire started in the area of exhaust muffler and quickly spread into the cabin.

- Newtown, CT, USA

problem #2

Dec 052007

Sienna 6-cyl

  • Automatic transmission
  • 40,000 miles
On December 5, 2007, I came out of costco to find the fire department had already put out the engine fire on my 2005 Toyota Sienna - absolutely no warning. It happened after I had gone in to shop so the engine was completely off with no person in it.

- Lynnwood, WA, USA

problem #1

May 172006

Sienna 6-cyl

  • Automatic transmission
  • 400 miles
Vehicle has excessive spark knock at low speeds, starting from a stop and at normal driving speed when engine is under a load. Spark knock worse when engine is warmed up and during warm weather. Changing octane level does not help spark knock. This has been happening since vehicle was bought in April 2005. Vehicle has been back to the dealer several times to try to fix the issue to no avail.

- Simpsonville, SC, USA

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