When braking there is a lunge forward sensation that causes the van to propel forward a little. The happens intermittently and can cause scares especially when driving with children. A T-SB-0047-24 was applied and still experiencing the same issue as it did not solve the issue.
2022 Toyota Redundant Sienna: sudden unintended acceleration
14 of the 119 complaints about the 2022 Toyota Redundant Sienna describe sudden unintended acceleration.
- owner complaints
- 14
- of this car's complaints
- 12%
- recalls
- 0
Is there a fix? No recall or service bulletin covers this area of the car yet.
Sudden unintended acceleration by model year
- 202214
- 20218
What owners say
Unexpected sudden acceleration (when braking) as I was slowing down from exiting a highway, just as I was approaching full stop, it felt like the regenerative braking stopped grabbing momentarily and I violently lurched forward for what seemed like a feet or two. I thought it was a fluke back then and thought nothing of it. It just happened again today as I approached a stop sign - again as I neared complete stop with brake depressed it felt like the brake stopped working for a second and the car again lurched forward violently as if I had lost control for what seemed like a foot. Would have hit the car in front of me if there was one.
Vehicle suddenly accelerates when depressing the brakes (lurches).
On a regular basis when applying the brakes the brake pressure will release causing the vehicle to lunge forward or momentarily stop decelerating. This release of the brake pressure is only for a second but during that time the van will stop or slow decelerating and if you are slow when this happens you will feel the van lunge forward. It has even happened at a stop with the brake applied and the van would move slightly forward as the pressure released and then reapplied. It almost feels like a computer signal is being reset when this happens causing the momentary release of pressure.
While braking at around 15 mph there is a sudden loss of braking force that causes the car to surge forward. This happens as the car switches from regenerative braking to pad braking. It has almost caused an accident a few times for me.
I bought this van new in March 2022. Since I have owned it I have had countless instances where I will have my brakes applied and the van will suddenly accelerate with the brake still applied. This has happened multiple times when I am braking on hills & I have nearly ran stop signs because of it, there are some dangerous intersections I travel frequently and this is a major safety concern. This needs to be addressed by Toyota or someone is going to end up killed or seriously injured in an accident from this malfunction. I am truly concerned for mine and my children’s safety when I am traveling in my van. I can’t trade it in because I still owe more than trade in value and can’t afford to be upside down. the federal safety agency please help me.
brakes release upon slowing to a stop, causing vehicle to surge forward. Software update will fix it, but dealership/toyota will not cover the cost to do so.
When pressing the brakes car will lunge forward. Used to happen very rarely and now it is happening sometimes multiple times a trip. Pulling in a parking space or stopping at a light and almost hitting the car in front of me because the car just lunges forward. No warning lights or messages it just randomly happens.
2022 Toyota Sienna - sudden acceleration or lunging when braking on right turns.
My vehicle occasionally exhibits a behavior during low speed braking (such as approaching a stop sign or red light) where the deceleration will briefly cease in spite of constant brake pedal pressure. This lasts for less than a second before brake behavior returns to normal. To the driver, it feels like a sudden acceleration (but I believe it is a momentary loss of deceleration). -- This behavior is intermittent and difficult to reproduce on demand. It seems to happen more frequently: - At low speeds, when gradually slowing to a stop. - Un uneven pavement (such as a street with speed bumps or potholes). - On downward slopes. -- I strongly believe the problem is related to transitions between regenerative, engine and friction brakes in this vehicle. I believe Toyota has a systemic issue related to the design and/or implementation of the hybrid braking system on this and similar models. -- This is not a case of "you just need to get used to how hybrids work", it is a case of "I press the brake, I expect the vehicle to decelerate". If you review Toyota online forums for the current Sienna, Highlander and similar Toyota hybrids, this issue is extremely common and many owners are complaining, so far Toyota is ignoring the issue.
Over the past 18 months, this vehicle has exhibited the following actions approximately 30-40 times. When slowing the vehicle, with brake pressure applied, the vehicle reacts appropriately until, at the slow speed( approximately 5-10 mph) it suddenly accelerates or surges ahead for approximately 1-2 seconds. The has occurred while in the process of turning as well as moving straight ahead. I have taken the vehicle to the dealer of the original sale, Shepard's Toyota, Thomaston Maine, and they have attempted to replicate this action. They were unable to do so. The reported to me that they contacted Toyota engineering and was told, I paraphrase, that when the drive battery is fully charged and the dynamic braking system is still creating a charge, the current is directed to the drive motors, despite the fact that the brake is applied to slow and stop the vehicle. These events have occurred inn the middle of turns, when attempting to stop at crosswalks, and stopping prior to entering a traffic stream. If I had not continued to apply the brake, the vehicle would have, in several case, collided with objects.
About five times now, when braking at slower speeds, such as at a light or parking, the car will accelerate and lunge forward or there will be a loss of the brake. My foot is depressing the brakes normally when this happens, but then I will slam harder on the brake to not hit whatever is in front of me. There does not seem to be any particular reason that causes this to happen, for instance temperature, and it happens randomly.
Related recalls
No recalls on record for this model year.
Questions about the 2022 Toyota Redundant Sienna sudden acceleration
Is sudden unintended acceleration a common problem on the 2022 Toyota Redundant Sienna?
14 of 119 owner complaints about the 2022 Toyota Redundant Sienna (12%) mention sudden unintended acceleration. The model year with the most reports is 2022.
Is there a recall or service bulletin for this on the 2022 Toyota Redundant Sienna?
There is no recall or service bulletin for this area of the car on record.
Other symptoms on the 2022 Toyota Redundant Sienna
VIN decoder
See the problems and recalls for an exact car
Buying a used 2022 Toyota Redundant Sienna?
Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.
Check its history