Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.

6.2

fairly significant
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
12,248 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

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2004 Toyota Sienna:

Unsubscribe any time. We don't sell/share your email.

2004 Toyota Sienna Owner Comments

problem #11

May 262009

Sienna

  • 10,500 miles

A D V E R T I S E M E N T S

While attempting to accelerate by pressing the gas pedal to approximately 3/4 of it's travel, I experienced no throttle response for 1-2 seconds with cars coming towards me. The engine then proceeded to rev to the proper level I was expecting. This type of situation also happens while attempting to pass a car on the freeway by pressing the gas pedal quickly. The car once again hesitates and then responds in 1 -2 seconds. The vehicle is a Toyota Sienna 2004 xle fwd. I've tried to use different fuel grades, ac on/off, tires properly inflated, no one in car/car full, day and night, all with the same result.

- Mililani, HI, USA

problem #10

Jan 012003

Sienna 6-cyl

  • Automatic transmission
  • miles
The contact owns a 2004 Toyota Sienna. When turning a corner at approximately 5-10 mph the vehicle would hesitate and lose power. The dealer stated that the vehicle needed a computer update, however; the system was unavailable. The dealer stated that the failure was not normal. The current mileage was 100,000. The failure mileage was unavailable.

- Freedmont, CA, USA

problem #9

Jan 152007

Sienna 6-cyl

  • Automatic transmission
  • 68,500 miles
Engine failure due to oil gumming.

- Rockville , MD, USA

problem #8

Oct 132006

Sienna 6-cyl

  • Automatic transmission
  • miles

A D V E R T I S E M E N T S

The automatic sliding door on my 2004 Sienna has been a problem since we purchased the vehicle. At times, we can't open the door from the outside and other times, we can. Also, we recently closed the door with the automatic button and for no apparent reason, the cable broke so that we now have to open and close the door manually. Also, we have had issues with the acceleration of the vehicle if we are going from a stop position or a slow moving (less than 10 km/H) position. The van seems to slow down before shifting into gear. This is a serious problem when driving especially with children in the vehicle. My warranty has expired and I'm looking at having to pay for this on my own. I am dissatisfied with Toyota, I have had this vehicle for only 2 years and I have had three recalls already. This is my 2nd Toyota product and my last.

- Espanola, 00, USA

problem #7

Mar 022004

Sienna 6-cyl

  • 3,724 miles
: the contact stated while driving out of a driveway at 5 mph, the vehicle stalled when acceleration was attempted. The engine warning signal illuminated. The problem had reoccured frequently at any speed. The dealership was not able to duplicate the defect in nine times the vehicle had been taken to correct the problem. The contact decided to obtain a second opinion from an independent certified mechanic who observed the coil ignition assistance burned out and the fifth cylinder was misfiring. The second opinion was ratified by another dealership. The contact expressed the dealership delayed the required repairs until the vehicle remaining warranty were exhausted. The dealership was now ready to make the repairs.

- Wesley Chapel, FL, USA

problem #6

May 102006

Sienna 4WD 6-cyl

  • Automatic transmission
  • 15,000 miles
: the contact stated a loud rattling noise was heard coming from the engine compartment of the vehicle every time it was started. There were no indications of any additional problems. The vehicle was taken to a sales dealer three times, and the dealer was unable to duplicate the problem. Update onh 06/05/2006.

- Vega Baja, PR, USA

problem #5

Jan 072006

Sienna 6-cyl

  • Automatic transmission
  • miles

A D V E R T I S E M E N T S

Toyota Sienna 2004, 19,000 miles not even 2 years old. 1. valves making noise when driving up hill at slow speed or when start driving. 2. wind noise is unacceptable. Problem begins at the very first day of driving the car. 3. one big knocking noise when the vehicle is moving, only when shift from park to D4 and starting to drive.

- Gretna, LA, USA

problem #4

Jun 012005

Sienna

  • Automatic transmission
  • 27,000 miles
Minivan does not alway accelerate properly. When the vehicle is slowing down, like when coming to a red light, the vehicle will hesitate when I try to accelerate if I have not already come to a complete stop. This seequence will usually reproduce the failure: 1. travel around 40mph. 2. quickly slow to around 10mph. 3. try to quickly accelerate to 40mph again. The vehicle will hesitate and pause before starting to accelerate.

- San Jose, CA, USA

problem #3

Jan 182005

Sienna

  • Automatic transmission
  • 5,000 miles
While driving at low speeds the vehicle went into neutral then hesitated when attempting to accelerate.

- Buena Park, CA, USA

problem #2

Aug 262003

Sienna

  • miles
I bought the Toyota Sienna on July 4 2003. I received a recall notice within a month and had repair done on August 29, 2003. The gasoline tank repair was done incorrectly, resulting in me being stranded away from my home, with two kids in the car, with gasoline oozing all over the ground. This was a clear fire hazard. Then in October 2004, I was driving on the highway, the driver side window came out of the frame. The dealership agreed it was manufacturer's defect and fixed it. I felt very unsafe driving home in that car. E now have received a recall notice about steering fluid hose defect and radiator defect. With 5 defects in one year after buying a new car I feel it is a safety hazard to drive this vehicle with two kids. This is also the car I use for commuting. I cannot rely on this vehicle any more.

- Bridgewater, NJ, USA

problem #1

Dec 202003

Sienna 6-cyl

  • Automatic transmission
  • 5,000 miles
Hesitation bogs on a acceleration, delay in a acceleration no power for a few seconds. Looses speed and cars behind catch up very quickly and worried about getting hit in rear end. My wife is worried about getting in an accident. Toyota dealer felt the problem, but no offer for repairs they say this is normal operation. This is a safety issue. We have had it in twice with no result. (2004 Toyota Sienna)

- Bradenton, FL, USA

Not what you are looking for?