2021 Toyota Redundant Sienna

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.

Automatic sliding doors and tailgate opening by self when parked at home and 4-5 locations in Canada (during 1 week visit).Host in Canada (20 yr Volvo exec) independently observed and took car to Canadian dealer.Condition not duplicated at their dealership.However,they submitted report to Toyota Canada. Return to New York,took car to dealer Westbury Toyota on 8/30/22.Dealer observed car onite-no door opening found. 8/31/22-Westbury Toyota returned vehicle to lessee with the information that they are filing a pass case with Toyota Corporate and advised lessee to return to Westbury Toyota if problem recurs

At 7:35am on 7/20/2022, I was traveling south on Clementa Ave SW in Monticello, MN. The conditions were dry and the sun was out. As I approached the intersection of 127th St NW, I began to slowly press the brake pedal. The vehicle started slowing down, but approximately 5 seconds after pushing the brake, the vehicle automatically let off the brakes, the vehicle lunged forward for about 1-2 seconds, even though I was continuously pushing on the brake pedal. The vehicle’s brake system then re-engaged and the vehicle stopped. This is not the first time this issue has happened and the dealership does not have any resolution to this issue. They attempted a software update, even though my VIN is not included in previous brake issues. This issue happens daily and poses a safety risk if I were attempting to brake behind other vehicles. The release of the brakes and lunging of the vehicle should not happen and feels like the vehicle is out of control.