2024 Toyota Sienna Hybrid Brakes Problems

Moving about 55 miles per hour on right lane of I-95 the Jeep in front of me braked abruptly. I braked hard but as my Sienna was quickly slowing down to stop, the brake pad felt spongy when it was slower and as I pressed even harder, it seemed to have stopped decelerating at that slower speed and that was when my Sienna slammed into the back of the Jeep. Happened today on July 15, 2026 at around 4:24 EST. I will also file this same report to Toyota. My wife and I are at the hospital getting checked, but my Sienna looked undrivable.

NHTSA ID

11750717

Incident

Jul 15, 2026

When approaching a stop sign or light and while the brake is already engaged the car will accelerate lunging the car forward from 3-10ft while driver maintains the same pressure on the break pedal.

NHTSA ID

11744764

Incident

Jun 17, 2026

Stepping on brakes - Car slows then accelerates a few seconds and lunges forward a couple of feet. Extreme safety issue. This occurred yesterday with my sister in the car and we almost rear ended the vehicle stopped in front of us. I have complained to the Cumberland Toyota dealership in the past and was told if they cant recreate the issue and it doesn't happen all the time there is no way to fix the issue. Yesterday I was almost in an accident because of this faulty design/anomaly associated with my car. This lunging forward is not suppose to happen and I want it fixed Toyota needs to come up with a resolution before it kills me. I have purchased this vehicle new 2024 and it has been happening since purchase - NOW its really bad

NHTSA ID

11738078

Incident

May 13, 2026

The contact owns a 2024 Toyota Sienna Hybrid. The contact stated that while the vehicle was at a complete stop, while attempting to depress the brake pedal, the vehicle unexpectedly lunged forward. There was no warning light illuminated. The contact stated that the failure had occurred several times without a warning light illuminated. The vehicle was taken to the dealer several times; however, the failure could not be duplicated. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 31,600.

NHTSA ID

11733541

Incident

Apr 24, 2026

Mileage

31,600 mi

I am reporting a possible safety defect in my 2024 Toyota Sienna Hybrid AWD, VIN [XXX] . The vehicle intermittently surges, lurches, or creeps forward while I am pressing the brake pedal and attempting to slow or stop. It feels as though the vehicle briefly adds power or braking force momentarily decreases even though my foot remains on the brake. The sensation is not normal creep alone; it feels like a brief unintended forward push while braking. The problem is intermittent, which makes it difficult to predict, but it creates a safety concern because it can happen when slowing, stopping, or maneuvering at low speed. I am concerned this could increase stopping distance or cause the vehicle to move forward unexpectedly. I am requesting investigation of possible defects involving the braking system, hybrid regenerative braking transition, brake actuator, pedal sensing, or related control software. It happens daily. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11728879

Incident

Apr 2, 2026

Looked online to see if other Sienna drivers had the same issue with the hybrid system. Brakes are accelerating a bit even when already pressing on the brakes. It has happened enough times to be concerning. We have not taken it to the dealearship as of yet but will be getting in touch soon , now that we know it's a known issue. No warnings from vehicle.

NHTSA ID

11694919

Incident

Oct 1, 2025

On rare occasions (about once every 500 miles), when uniformly applying force to the brake pedal, the deceleration suddenly ceases and the vehicle seems to jerk forward. To a passenger, it feels like the driver's foot slipped off the brake pedal, but the driver continued to provide the same uniform force to the brake pedal and lost all deceleration. Typically, the driver is startled and presses significantly harder on the brake pedal jerking all occupants forward. The brakes re-engage and continue the deceleration at a much higher rate. Toyota addressed this problem with TSB 4724 which involved reprogramming the brake actuator assembly. This corrected the problem for about 3 months, but it is now occurring again. When the car was taken to the Toyota dealer again, the technician stated that TSB 4724 was cancelled, he could not duplicate the action (even though he was told it only happened on rare occasions), and claimed that the "brakes function properly as they should." Fortunately these loss of braking incidents have only occurred on dry pavement so that the driver did not lose control of the car when slamming on the brakes to compensate for the loss of deceleration. Coming down a hill on a snow covered road could have caused the vehicle to slide into an oncoming lane. It is my speculation that there is a null spot that exists during certain circumstances which causes there to be a "gap" between when this hybrid vehicle transitions between the dynamic hybrid brake and the friction wheel brake. Both braking systems independently work fine, but the transition between them (on rare occasions) does not occur continuously. This causes the driver to experience an unexpected loss of braking which, under the right conditions, could cause the driver to loose control of the forward motion of the car. As an engineer, I feel it is unacceptable for a safety system (braking) to not properly operate 100% of the time! On a Toyota owner's site, others have seen the same.

NHTSA ID

11685675

Incident

Aug 6, 2025

Intermittent unexpected acceleration during braking. This has occurred while braking into a downhill as well as at low speeds when turning into a parking space. Additional braking is required to stop vehicle or maintain desired braking.

NHTSA ID

11679859

Incident

Aug 5, 2025

When going down hill while braking, the brakes will release causing the car to lurch forward and then they grab again. It’s intermittent and Toyota has a TSB on it but the dealership with not fix it because they can’t duplicate the problem. It can cause people to take their foot off and of the brake pedal and trying to apply it again. Which can cause someone to rear end another car.

NHTSA ID

11668478

Incident

Nov 4, 2024

In general the braking system on this vehicle is poor. The van does not seem to want to stop unless you apply a lot of pressure on the brake pedal. I have taken the vehicle to the dealership who explained to me that the braking operation is normal. I replied “so the poor brake design was intentional”. The dealer said the braking system takes a little while to get used to. I have contacted Toyota corporate 5 times to express my concern about the brakes. The customer service representatives say that they will pass my concerns along. I personally own 6 vehicles. The brakes on this Toyota are by far the worst. It is not even close. I do not feel like this vehicle is safe. This is a minivan that is used to move families around. I do not feel safe in this vehicle and most importantly I am worried every time my wife drives this vehicle that someone will slam on the brakes in front of her the van will not stop in time. Toyota is the world’s largest auto maker, they can and should produce a better braking system than what is available with this van. This is unacceptable with braking technology available at this time in automotive history. Their lack of response to my concerns in also disappointing. Thank you for hearing my concerns.

NHTSA ID

11665469

Incident

Jun 7, 2025

When decelerating either for a traffic light or otherwise at the slow speed when the break is applied before coming to a stop, the car accelarates and then I have to slam on the breaks. this is very dangerous

NHTSA ID

11660131

Incident

Apr 15, 2025

When I am rolling to a stop, or lightly pressing in the brakes, the car will occasionally jolt forward and I have to slam on the brakes. It is not every time but has happened many times since buying the car new. I brought it into the dealership and they could not replicate it, but it makes me so scared to drive. This could result in an accident or the hitting of a pedestrian. No warning lights.

NHTSA ID

11656862

Incident

Apr 25, 2025

Unexpected sudden acceleration when braking

NHTSA ID

11649171

Incident

Mar 1, 2024

The contact owned a 2024 Toyota Sienna Hybrid. The contact stated while driving at an undisclosed speed, the brake pedal was depressed, however, the vehicle failed to stop as intended. No warning lights were illuminated. The contact stated the vehicle was unstoppable. The contact stated the option was to crash into the three vehicles which were coming from the opposite direction or to crash into the pole to bring the vehicle to a stop and avoid injuring pedestrians. The paramedics and the Police department arrived at the scene of the crash. The contact's wife, who was the occupant of the front passenger's seat, was transported to the local hospital. The contact sustained bruises and an open wound which was continuing to heal. The contact's wife sustained bruises and bumps. The vehicle was towed to a local tow yard. The vehicle was condemned as a total loss. A police report was filed. The manufacturer was made aware of the failure. The manufacturer ordered an investigation of the black box. The investigation was completed, and the contact was provided a copy. The failure mileage was approximately 3,000.

NHTSA ID

11648352

Incident

Jan 24, 2025

Mileage

3,000 mi

When coming to a stop at a red light or a stop sign vehicle keeps surging forward. Something in the vehicle is releasing the brakes. Seems to be happening on a regular basis, but is still randomly happening, Every day. If you’re close enough to the vehicle in front of you, you will hit the vehicle

NHTSA ID

11615001

Incident

Sep 17, 2024

I was at a complete stop. There were no obstacles around me or oncoming. When I pressed the accelerator nothing happened for a full 3 seconds, until my vehicle jolted forward at an excessive speed. Brakes were not working.

NHTSA ID

11592492

Incident

Jun 4, 2024