2020 Toyota Corolla: sudden loss of power

Filed Oct 8, 2026 · Brakes, Engine · CA

What component or system failed or malfunctioned: complete slave cylinder failure resulting in loss of braking and ability to shift. Luckily I was traveling at a low rate of speed when this happened, but if this happens to anyone on the freeway or while turning against traffic for example they would have no control of their car and could be seriously injured. I took it to the dealership and they diagnosed it as a slave cylinder failure at only 70k miles. This is incredibly pre-mature. The vehicle has not been inspected by the manufacturer, only the dealership but I am trying to escalate the issue. No warnings at all, I regularly get my car serviced on there were no instances of the clutch acting strange or brakes losing power (because the clutch and brakes share the same fluid reservoir) prior to this incident.

Filed May 13, 2026 · Transmission · NJ

"On 04/09/26, I took my vehicle for regular maintenance and an oil change; no potential issues were reported. I operated the vehicle in good faith, trusting its safety. However, on Sunday, 05/03/2026, while driving at highway speeds, the clutch pedal failed and [stuck to the floor / slipped severely]. This caused an immediate loss of power to the wheels in high-speed traffic, creating a life-threatening situation and a high risk of a rear-end collision. No warning lights appeared prior to this failure."

Filed Aug 27, 2022 · Driver assistance, Transmission · MO · crash · 3 injuries

I am not sure what the component is but I am driving and as I accelerate the gas my car will lose power to increase speed. If I am at the stop sign or stop light and I proceed to go the car will stall and not get going once I place my foot on the gas. I have reached out to the dealer by phone and when I have obtained service I am being advised that it's nothing. But I have experienced it on multiple occasions and even had an accident and nothing is being done to resolve the issue. I know that it can't be normal for the vehicle to do that and I am tired of getting the run around in regards to it. I was able to see that there has been a recall but do not see that it is in regard to me vin number. Can you please assist me with this matter. I should not be in the middle of driving or at a stop light and not able to accelerate my vehicle to a regular speed. I would like to have this matter looked into by a different Toyota dealer. Also it happens randomly and when I take to the dealership nothing is ever done and the issue is constantly being ignored. I am being told that due to no check engine light being on that my car is fine and its not. I don't want to lose my life due to the fact that I have purchased a faulty car and have not been made aware of any issues to protect my safety.

Filed Oct 20, 2019 · Fuel system, Transmission · FL

2020 toyota corolla se -(vehicle purchased new) (CVT transmission) upon minimal to normal acceleration vehicle makes a hard shift feel like a bump kick in acceleration of speed between 8-9 MPH. Will feel more of a hard shift at times if coasting with minimal speed then to the normal acceleration (start and stop traffic type of conditions). Periodically once reaching to speed of 36 MPH seems like the transmission is starting to slip then continues with normal operation. While sedentary at stop light vehicle has had loss of power in and out near stalling out. Separate occasion without the air conditioner being on, a rough idol took place. At times if put in sports mode shifting is smooth without too much trouble; with exception of at higher speed open road removing off the gas pedal will make a whining high rev noise like the transmission went out and did not down shift even with pressure applied to the brake. Will then down shift after approximately 15-20 seconds. Lane departure indicators have gone off without there being a correct response for that action taking place. Vehicle has been owned for less than ninety days and appears to continually further in its defects.

Filed Aug 31, 2019 · Transmission · 199 miles · TX

07/09/19 - three days after taking delivery of a brand new 2020 corolla sedan, my car stalled in the middle of a busy city street. I was stationary with foot on the brake waiting to make a left turn. When I took my foot of the brake and attempted to accelerate, it had a complete power failure. Red warning light came on saying engine power low. I was unable to start the car again for several minutes. I was nearly hit by cars going around me. I took it to the dealer for service and there were no error codes and they could not duplicate the problem. 08/06/19 - my brother was driving on a highway in stop and go conditions during rush hour traffic. With his foot on the gas pedal, the entire vehicle jerked or jumped several times in succession, stopped and then did the same thing twice more. It felt as if it was going to lose power or not getting enough gas. I took it back to same dealer for service. Once again, no error codes and they were unable to duplicate the problem. Service foreman told me those 2 incidents were definitely related. I reported both issues very dangerous incidents to toyota customer support as I feel that I am driving an unsafe vehicle. At first, they were receptive and even sent a toyota factory representative to inspect the car. Then my case manager told me they found nothing wrong and "could not verify my concerns". She said there was nothing more they could do and there were no repairs to be made. After doing more research online, I found that the 2019 corolla hatchback was recalled in december 2018 to replace the CVT transmission due to a manufacturing error that could cause loss of motive power. The info I read stated the exact same engine is in the 2020 corolla sedan, but it has not been included in a recall. I am very concerned for my safety, as well as that of my passengers, and other vehicles.