2021 Toyota Redundant Sienna brakes problems

Related recalls

No recalls on file.

What owners say

1. Filed Sep 27, 2025NJBrakes

   When braking to a stop at low speed (stopping at stop sign or at light), then car accelerates forward even though my foot is on the brake attempting to slow the car down. This unintended acceleration is dangerous and can cause an accident.

   NHTSA complaint #11690131 · source
2. Filed Jul 17, 2025MIBrakes

   Brake Transition Issues: I have noted frequent jolts of power when braking, which creates at least the sensation of, if not actual acceleration while breaking. Web research suggests this may be linked to the vehicle switching between regenerative and mechanical braking systems, and that the problem is acute with 2021 and 2022 Toyota Siennas, which, if accurate, means Toyota has applied a fix to subsequent model years, but has not systematically addressed the first two years…

   NHTSA complaint #11674265 · source
3. Filed Jun 15, 2025WIBrakes

   Occasionally the brakes seem to stop working briefly, and the van even accelerates while the brakes are engaged. It happened again today but has happened since we got the van new in 2021. The dealer cannot replicate the problem. The problem is discussed on this thread: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

   NHTSA complaint #11667043 · source
4. Filed May 28, 2025CABrakes

   When braking, the brakes will unexpectedly slip. There is generally a loss of brake and a split-second surge that is rather like acceleration (since the car is no longer being slowed down by the brakes). This occurs unexpectedly, unpredictably and without any warning. Having the car suddenly move forwards without brakes is dangerous and could cause the car to hit a pedestrian or another car. This has also happened multiple times while angle parking which almost caused a…

   NHTSA complaint #11663483 · source
5. Filed May 14, 2025CABrakes

   Car accelerating when braking especially at slow speed. This has happend many times and dealership not aware of a solution for this issue. This acceleration do not happen all the time but happens radmonly. Concerned about safety and hence reporting.

   NHTSA complaint #11660919 · source
6. Filed May 7, 2025TXBrakes

   When slowing down the brakes work at first, but the slip and the vehicle rolls freely, then once you press them harder it engages and brakes. But for about 2 seconds there is no breaking! This has happened several times prior to today.

   NHTSA complaint #11659633 · source
7. Filed May 2, 2025TXBrakesSeats & Seat BeltsVisibility & Wipers

   My van been giving me some weird issues lately. When I’m going downhill, my brakes don’t seem to work well! I have to push it all the way down, like a spongy. It doesn’t break until I put on the emergency brake. the seat broke only weighed 185 pounds! the wiper blades don’t do a great job cleaning the driver’s side after I bought new ones. Dealership wipers

   NHTSA complaint #11658450 · source
8. Filed Apr 23, 2025KYCrashTowedBrakesTransmission & Drivetrain

   When pulling into a shopping center parking space, my mother applied the brakes to slow down, but the vehicle seemed to surge and hit the car in front. It then surged again and pushed that car into another. No airbags deployed, and no one was injured, but someone could have been hurt either by the van itself or one of the other 2 vehicles. The dealer is scheduled to look at the vehicle, but stated on the phone that they "hadn't heard of this happening". There were no warning…

   NHTSA complaint #11656450 · source
9. Filed Mar 7, 2025FLBrakes

   I was driving home from the grocery store going roughly 40 mph. I turned into a turn lane going into our neighborhood and started to press the break. Instead of breaking my car accelorated. It happened quickly, maybe 2 seconds. But it was very concerning. A warning flashed on my dash board that said, "break accelorating." I continued to push the break and started to slow down.

   NHTSA complaint #11646995 · source
10. Filed Dec 11, 2024TXBrakes

    Car lunges forward when braking. This occurs at low rates of speed and is particularly prone to occur when making right and left turns. This has been going on since I bought it in 2021. Dealer laughs at me

    NHTSA complaint #11630015 · source
11. Filed Oct 14, 2024CABrakes

    This problem has been happening for a while now, over one year. When I am braking there is a jolt of acceleration. This happens frequently, and I believe this is dangerous.

    NHTSA complaint #11619685 · source
12. Filed Sep 23, 2024ARBrakes

    When applying the brakes, at lower speeds around 20 MPH my Sienna lunges forward for a few seconds, increasing speeds. This is happening frequently in school zones due to the slow speeds. Dealer told me it was out of warranty (36k or 3 yrs) and i had to pay $250 for diagnostic plus $300 for a TSB solfware reset because the Fed didn't receive enough complaints from users to make Toyota do a recall on this Safety issue. This is a major safety issue myself and many other Sienna…

    NHTSA complaint #11615984 · source

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology