2014 Toyota Sienna: sudden unintended acceleration

5 of the 164 complaints about the 2014 Toyota Sienna describe sudden unintended acceleration.

owner complaints: 5
of this car's complaints: 3%
typical mileage: 78,929
recalls: 0

Is there a fix? 2 service bulletins cover this area of the car. See below

Sudden unintended acceleration by model year

2020
1
2019
1
2018
2
2017
3
2016
1
2015
2
2014
5
2013
3
2012
2
2011
7
2010
7
2009
5
2008
21
2007
10
2006
6
2005
23
2004
22
2003
6
2002
5
2001
2
2000
5
1999
3
1998
3

What owners say

Filed May 8, 2026 · Acceleration · 120,000 miles · OH

The contact owns a 2014 Toyota Sienna. The contact stated that while driving at various speeds the vehicle had experienced unintended acceleration. During the failure the driver forcely pressed the brake pedal to stop the vehicle. The contact indicated that the failure had once occurred while a transporting a Uber passenger. The cause of the failure was not determined. The manufacturer and local dealer were not contacted. The failure mileage was 120,000.

Filed Jul 6, 2020 · Acceleration · 70,000 miles · IL

3 times this year, when slowing to a stop with my foot on the brake, the car suddenly accelerated, requiring me to apply as much brake pedal pressure as I could, as well as shifting to neutral to stop the car. This has occurred once when coming up to a stop sign, and twice while pulling into a parking space. Both times when pulling into the parking space, I was barely able to stop in time, almost hitting a car in the space in front of me. After the last time this occurred (7/3/2020), the car was taken to st. Charles toyota on 7/6, where they found nothing wrong with the vehicle. This started just this year; the vehicle has approx. 70,000 miles on it. We have owned the vehicle since new - it did not do this for the first 4.5 years of service.

Filed Feb 25, 2020 · Acceleration, Brakes · 78,929 miles · NY

Tl* the contact owns a 2014 toyota sienna. While driving 15 MPH the brake pedal was applied however depressed to the floorboard, the vehicle accelerated and surge forward without warning. The contact shifted into neutral and turned the ignition to the off position. The vehicle was towed to romano toyota 6400 basile rowe, east syracuse, ny 13057(315) 445-1070, where the contact was informed that the vehicle operated as designed. The vehicle was diagnosed but not repaired. The manufacturer was contacted and informed of the failure. The failure mileage was 78,929. *bf

Filed Feb 15, 2020 · Acceleration · 90,983 miles · NJ

Just before the vehicle comes to a full stop, there is unintended acceleration and I could see even the RPM(scale) to spike temporarily. This has been happening every time when outside temp is cold and vehicle is driven with cold or slightly above cold engine temperature. There is a risk of hitting another vehicle or meeting accident if misjudge my braking because of this problem. However it does it even on highway under normal temperature while I'm braking or slowing down.

Filed Aug 30, 2018 · Engine · 500 miles · GA

As city street braking deceleration is ending, the engine suddenly surges and accelerates RPM. I must immediately apply hard pressure on brake pedal to prevent van from surging ahead and also immediately move automatic shift lever to neutral to disengage power train. After about 2 seconds the RPM acceleration will stop and return to normal. Toyota dealer checked issue multiple times, finding no issues. This is a random occurrence that started shortly after purchase and continues to this day and I've come within inches of smashing into vehicles in front of me. I reported to toyota corporation but the ombudsman blew me off saying there is no known sudden acceleration issues. No offers to resolve from toyota. This has happened so many times, I can no longer remember the initial date and exact mileage this issue started to occur other than within the first 4 to 6 months of purchase. Additionally the speed control was never activated when issue occurred.