2021 Toyota Redundant Sienna

The braking/throttle system malfunctioned. It is available for inspection. On multiple occasions, the vehicle braking system has engaged then disengaged before coming to a stop. When coming to a stop with the brake pedal depressed, the vehicle full disengaged braking while the brake pedal was still depressed. Luckily, the vehicle reengaged the brake before we were entered into cross traffic. On multiple occasions the accelerator pedal was depressed, and the vehicle proceeded into traffic, but then the throttle control disengaged, causing us to nearly have a collision. Luckily, the vehicle throttle reengaged before we were hit by another vehicle. Our safety feels at risk because we don't know if the vehicle will stop, causing us to be involved in a collision, and we will be at fault for the collision. We have taken it to the dealership multiple times, but they have not been able to reproduce the issue, and we cannot reproduce it ourselves. The conditions for the issue to occur do not seem to be consistent. We have documented dates and time when the issue has occurred, but the dealership was not able to find vehicle logs for those dates. Only the dealership and Toyota mechanics have inspected the vehicle. There were no warning indicators. The first documented occurrence was 9/26/2022 3:30PM CST.

While braking the brake pedal pressure on the brake pedal and the brakes themselves will lose pressure and you have to suddenly press harder on the pedal to keep stopping distance it happens randomly, and without warning I’ve had it into the dealer. They replaced the brake antilock pump for an unrelated reason as they say, there are no recalls I explained the problem to them. Several times before the brake pump was replaced. They said they know of the problem but don’t know of a fix, it’s quite dangerous when it happens

I would like to make formal complaint in regards to a manufacture defect. I purchased my Toyota Sienna XSE brand new in August of 2021 at Cerritos Toyota in California. On December 24th at approximately 1:30 p.m. on Christmas eve, after filling up gas at Sam's club in Fountain Valley, CA. I pull out on to the street heading northbound on Warner approaching intersection as I come to complete stop on red. All of a sudden, my Sienna completely shut itself off and the engine light came on. I put it back on park and restart the car. As I attempt to accelerate forward. The car jerk and the brake didn't work and the engine light came on. Fortunately, I was able to make a U turn and pull into a gas station near by ( Shell) and I thank the lord almighty there was no car right behind me. I could of gotten rear ended. It was the most terrifying moment of my life. My wife and I was in the car at the time of the incident. We waited patiently over an hour for Triple AAA to have it tow the nearest dealership next to my house in Long Beach, CA. My 2021 Toyota Sienna currently has 52,023 miles and sitting at the dealership to be repair at Long Beach West Coast Toyota. I have contacted Toyota of this incident and they refused to fully covered repair instead they offered me 700 payment assistant the rest would come out of my pockets. I believed the car should be part of the campaign recall and nothing should come out my expense. I would like you you guys to investigate the incident and look into this matter as soon as possible because there thousands like my mind that could there have the same issue but was not part the campaign recall. A bulletin was published on April 13, 2022 affecting 2021 -2022 Toyota Sienna. Production Period March 3rd, 2020 through April 7th 2022. Manufacture's Campaign Number: Toyota: 22TB03

The vehicle gets a jolt of power or speed while braking slowly or coming to a stop. This could result into an accident. This was addressed to multiple Toyota dealers and the problem was unidentified or undetectable to the technician multiple times. The problem is reported by several Sienna forum users but it is not being fixed by Toyota dealers.

I currently have 35,000 miles on my 2021 Toyota Sienna. Ever since I passed 30,000 miles I’ve noticed a difference in the braking. When I start to brake it feels normal and then all of a sudden it feels as if there’s no braking and the van surges forward for a fraction of a second before the brakes engage again. I’ve experienced this on highway exit ramps, braking before turning into parking lots and while coming to a stop at traffic lights. It usually happens around 40 mph & 20 mph. It does not happen every time I brake but it happens multiple times every day. I took it to my Toyota dealer but they told me they could not replicate the brake malfunction. There are a number of other Sienna owners who have documented their same experiences with surging brakes on an online Toyota Sienna owners forum. I have not had an accident yet but I find this brake surge very concerning.

Occasionally when we hit the brakes the car surges forward ever so briefly and then the brakes finally catch. So far this has only lasted for a second or so, but we are concerned that it could get worse or not stop at all. My car is at the dealership now. They were unable to duplicate the issue. It has been happening mostly while driving at higher speeds (45-55 mph) and then needing to stop for a traffic light or similar. They were not testing it in this same situation. There were taking it out in stop and go traffic. They kept it overnight to try again tomorrow, but the tech didn’t seem to be taking it very seriously saying he wasn’t get paid for it since it’s still under warranty and he’s not seeing the issue. They checked the computer for error messages and said they found none. I haven’t noticed any warning lights turn on. This is very disconcerting. It has happened multiple times since we purchased the car in Sept 2021.

When braking under a load - such as braking while descending a hill - the vehicle will be slowing as anticipated when the brakes are applied, and then for a split second the vehicle feels like the brakes disengage. The pedal pressure doesn't change. The vehicle may not actually speed up, but it definitely feels like it's no longer decelerating. Then a split second later the brakes kick in again and the car responds as expected. This happens nearly every day I drive the vehicle and has since it was new. I've got 28000 miles on it now. I've not hit anything as a result, but it makes for a stressful few seconds - even though I now anticipate it will happen. The explanation I've been given is that the sensation of momentary brake failure is the vehicle transitioning between regenerative braking and mechanical braking. However, this definitely doesn't seem like a normal and acceptable way for a vehicle to function.