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.
Toyota Redundant Sienna sudden acceleration problems
22 of the 284 owner complaints about the Toyota Redundant Sienna describe sudden unintended acceleration, most of them for the 2022 model year.
- owner complaints
- 22
- worst model year
- 2022
Is there a fix? No recall or service bulletin covers this area of the car yet.
By model year
Often reported together
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.
Unexpected sudden acceleration when braking at low speed
Intermittently and randomly the vehicle will lunge forward with the brake applied. I engage the brake, the vehicle slows and then lunges/lurches forward as if I were not braking. Not only is this terrifying but it is also extremely dangerous. This has happened many times since purchase in February 2021 and continues to now.
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.
Related recalls
No recalls on record for this model year.
Questions about the Toyota Redundant Sienna sudden acceleration
Which Toyota Redundant Sienna years have sudden unintended acceleration problems?
The model years with the most reports are 2022 (14 complaints) and 2021 (8 complaints).
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