The contact owns a 2023 Toyota Sienna Hybrid. The contact stated that when attempting to apply the brakes while driving at 30 MPH or at lower speeds, the vehicle suddenly lunged forward. The failure occurred approximately 7 times, with the most recent occurrence causing the vehicle to lunge into an intersection, where oncoming traffic managed to avoid a collision. On that same day, the failure occurred 3 to 4 times. The vehicle was taken to the dealer, where the failure was diagnosed, and the contact was advised that a software update titled "Braking Comfort" was available to improve brake performance; however, the software update was not performed. The failure mileage was approximately 35,400.
2023 Toyota Sienna Hybrid: sudden unintended acceleration
6 of the 71 complaints about the 2023 Toyota Sienna Hybrid describe sudden unintended acceleration.
- owner complaints
- 6
- of this car's complaints
- 8%
- recalls
- 0
Is there a fix? No recall or service bulletin covers this area of the car yet.
Sudden unintended acceleration by model year
- 20243
- 20236
- 20221
- 20211
What owners say
The brakes on my '23' Hybrid Toyota Sienna seem to have a sudden acceleration when braking at times. Typically, it happens when braking going down a hill or around a curve (at slower speeds) and sometimes when trying to come to a full stop. This has caused me to almost rear-end other vehicles on several occasions and has also caused me to go slightly beyond the stop sign, putting the nose of my car in the street. It is not reproducible at the dealership. It has happened since I drove it off the lot in July of 2023 and happens randomly and without warning. This is scary when you seem to be braking in plenty of time to keep safe distances and then you suddenly get propelled forward! It happens weekly and has happened weekly since purchase. In speaking with other owners, this sounds like a common issue.
When braking vehicle feels like it is being bumped from behind. Dealership says it is the vehicle switching from regenerative braking to normal breaking but it causes the car to lunge forward. It feels like the vehicle is going to lunge into oncoming traffic. I have to slam on the brakes to stop it. It’s very unsettling.
While braking car will lunge forward regardless of speed. It happens several times a week since purchase of vehicle. I had a few near miss accidents where I almost collided with a vehicle in front of me. There is no warning lamp indicator for this event. Investigating on the internet gave me insight that this is a common problem not being addressed by Toyota.
I turned right to park behind another car on the driveway and my car suddenly accelerated hitting the car in front. The collision was strong enough that the car that was hit then hit a barrier at the home.
UNKNOWN. Randomly, while lightly braking, the vehicle will lunge forward. Does not always happen and unable to recreate it but has almost caused a few accidents. Van lunges forward for a second or so and then the brakes will re-catch or work again and the vehicle slows again. Scary. Have gone to toyota dealership but they insist nothing is wrong and they haven't heard of this issue. Forums with other Sienna hybrid owners state the same issue. Unsafe. Has happened multiple times, happened twice this last week.
Related recalls
No recalls on record for this model year.
Questions about the 2023 Toyota Sienna Hybrid sudden acceleration
Is sudden unintended acceleration a common problem on the 2023 Toyota Sienna Hybrid?
6 of 71 owner complaints about the 2023 Toyota Sienna Hybrid (8%) mention sudden unintended acceleration. The model year with the most reports is 2023.
Is there a recall or service bulletin for this on the 2023 Toyota Sienna Hybrid?
There is no recall or service bulletin for this area of the car on record.
Other symptoms on the 2023 Toyota Sienna Hybrid
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