2008 Toyota Sienna acceleration problems

Filed Nov 6, 2025 · Acceleration · NC · crash · 1 injury

Throttle stuck while in reverse pulling out of a parking spot and accelerated resulting in backing into the building

Filed Feb 6, 2025 · Acceleration, Brakes · MD

I have had the traction control go on while driving on the highway even when I turn it off. Sometimes the VSC and TRAC OFF lights go on while driving. The roads are dry. Whenever I take it in to the mechanic, all the lights are off. They pulled a zero calibration code and recalibrated. It still kept happening. Then I was driving around a curve on highway speeds when the traction control light went on and the van suddenly braked on its own and I almost lost control. The tires are new and the roads were dry.

Filed Nov 16, 2021 · Acceleration, Brakes · PA

Anti skid/slip malfunctions, Brakes are automatic applied while turning a corner. When this happen one dry road surfaces it was harder to control the car. This happen multiple times in the pass. Yes my safety and others on the road was put at risk. Yes been confirmed by independent service centers. 4.) UNKNOWN 5).No. The warning indicator light and buzzer comes on at the time the incident happens.

Filed Jun 12, 2021 · Acceleration, Brakes · CA

2008 Toyota Sienna. Driving down steep right turns, VSC light comes on, urgent beeping alarm and tires grip and grip vehicle brakes going 20-30+ mph on dry road. Very scary and dangerous, and has continues repeatedly over the past year on curvy right turns. Local mechanics don't know what is wrong with the vehicle. Many Sienna owners have similar problems listed on Carguru. https://www.cargurus.com/Cars/Discussion-c9152_ds656326 Please insist on a manufacturing recall for this vehicle. It is unsafe and could easily cause an accident. Thank you. Concerned original car owner.

Filed May 14, 2021 · Acceleration, Engine · 108,000 miles · TX

Car speed varies when doing a moderate speed example 40 MPH sometimes feels like its engine slips and speed slows car jumps forward feels like engine slips or gear shifts. Engine bogs down or sometimes revs up a little..scares me sometimes but no choice but to drive

Filed May 14, 2021 · Acceleration, Electrical · 108,000 miles · TX

Brakes have been replaced, and checked several times make a loud grinding noise in wet weather when backing up and sometimes when applying pressure while driving also a 🔊 noise and brakes seem to slip have had to pull over because it scares me can not find anything wrong but continues to persist. Both in highway driving and regular street driving

Filed Mar 25, 2021 · Acceleration, Brakes · 146,892 miles · VA

While on an on-ramp; the vehicle at about 35 MPH started blinking the slip light and slowed the van down, also causing I think the brakes to engage with force. Happens while driving normally and on ramps. I had the rack and pinion replaced and still has done this.

Filed Dec 8, 2020 · Acceleration, Brakes · 170,000 miles · TX

The vehicle stability control will unexpectedly engage in instances where it shouldn't activate. The most common is a long, slight curve on at freeway speeds on dry pavement. The second most common scenario is accelerating to enter the freeway. When vsc engages, the vehicle will lurch to the side it was activated on and curtail any acceleration. This makes the vehicle hard to control when on a freeway curve and when attempting to accelerate to merge onto the freeway, causing unexpected motion that is a hazard to remaining on the road or causing the vehicle to be in an accident with other vehicles. There is no indication that there are malfunctions in any system that would cause this to occur. Note: mileage on the odometer is ~170,000 miles.

Filed Jun 27, 2019 · Acceleration, Brakes · 170,000 miles · TN

Tl* the contact owns a 2008 toyota sienna. When the contact switched lanes or made a turn, the brakes activated on their own. The failure occurred on flat or curved roads and while driving 30 MPH. Sometimes the brakes worked properly, but sometimes they did not work at all. The contact also stated that the vehicle would occasionally accelerate and decelerate on its own and the steering wheel made an abnormal ticking noise. Furthermore, the vsc and traction control indicators illuminated. The vehicle was taken to toyota knoxville (10415 parkside dr, knoxville, tn 37922), but they did not assist. The vehicle was then taken to fox toyota (228 fox family ln, clinton, tn 37716) where it was diagnosed that a steering angle sensor needed to be installed. The vehicle was not repaired. The manufacturer was made aware of the failures and provided a case number. The failure mileage was 170,000. *bf

Filed May 28, 2019 · Acceleration, Brakes · 100,000 miles · WI

October 2016 this problem of my 2008 toyota sienna started- on slight curves doing 30-40mph I would hear a clicking noise coming somewhere underneath the front right end almost as if under the dash, the vsc light would flash. I took to a toyota dealership, had a mechanic test drive with me they said the problem was that my tires werent aligned with my last tire change(which was done at their toyota dealership) toyota told me I needed to replace all the tires and have the wheels aligned. I did this, problem continued. I took my van in again to toyota, they lied and told me I needed new brakes, and some other things I didnt need. Decided to get a 2nd opinion from 2 other auto shops and found out toyota lied about the brakes, they were fine and they both were unable to find out my problem. I found this out going to 2 other auto shops asking for them to look into the original problem. Now today may 2019 this problem still exists, but has gotten worse. Now-the vsc light comes on, it still clicks, the ABS light and warning sound goes off, feels as if ABS engages, as it jerks and im unable to accelerate during this time until im on a straight away. Very scary when it happens the van starts jerking and unable to acelerate, not safe to take my family in. Never buy another toyota again...