2024 Buick Envista

What component or system failed or malfunctioned, and is it available for inspection upon request? Answer: The brake system failed, specifically involving the brake master cylinder and/or electronic brake booster assembly. The vehicle and affected components are currently available for inspection at a Buick dealership. How was your safety or the safety of others put at risk? Answer: The vehicle experienced a complete loss of braking while in motion. The brake pedal did not provide normal stopping capability, and the vehicle did not slow or stop as expected when the brakes were applied. This created an unsafe driving condition due to the inability to stop the vehicle using normal braking input. Has the problem been reproduced or confirmed by a dealer or independent service center? Answer: Yes. The vehicle was inspected by a Buick dealership following the incident, and the dealer confirmed a failure of the brake master cylinder and/or electronic brake booster assembly. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Answer: The vehicle has been inspected by a Buick dealership. General Motors Customer Assistance has been contacted regarding the issue. No police report was filed, as no collision occurred Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? Answer: There were no warning lamps, messages, or symptoms prior to the incident. Warning messages and indicator lights appeared at the time of the failure, including brake system warnings, Stabilitrak, and steering assist reduced.

In April of 2025 the brakes failed at a slow speed of less than five miles per hour, after bumping into a curb in a parking lot. I put the car in reverse and pressed on the brake pedal and again the car did not stop quickly. The brake pedal felt mooshy and went to the floor and it felt like the car coasted to a stop rather than stopping quicker like normal. I put the car in drive and the same thing happened again. I turned off the car, let it sit still for five minutes and then restarted it again. This time I tested the brakes again and the car stopped like normal and the brake pedal felt normal again too. My safety and the safety of others was put at risk because the brake system was not working good enough to stop the car in a normal fashion and could have been in an accident. I took the car to the dealer so they could check it out. They reported that they couldn’t find anything wrong with the brake system or the computer and that they could not duplicate the problem. There were no warning lamps or warning messages or symptoms that appeared before, during or after this incident happened. The car is still available for inspection upon anyone’s request.

I was driving and while trying to put on brakes and stop I couldn't . I noticed that the Antilock Braking System light came on along with other lights. I almost hit a car because I could not stop. I was very frantic and scared. I could have hurt someone including myself. I am still shaken by this. I called roadside service and they towed it to Suntrup Buick in St. Peters Mo. After the car was delivered to them they called me 30 minutes later saying "no lights are on". I told them I have onstar and if they would like I can send them the alert they sent on my app. The alert is still there which says "Schedule service now". Braking system requires your attention now". I also have snapshots of the warning notice. I don't want a vehicle that has brake issues ..this could have cost me my life.

On four separate occasions now, while driving, the vehicle has completely shutdown. Two times this has happened in a parking lot and was relatively safe when it happened, but the other two times have been while driving on the freeway at freeway speeds. On all occasions, the entire dash will flicker a couple times, while the engine will sputter and then shut off. When this happens ALL systems including brakes, dashboard, engine, and steering are completely inoperable. Twice this has happened on the freeway while moving at freeway speeds. Thankfully, on neither occasion did any accidents or injuries occur, but it could very well have been fatal. On all occasions, the car will remain off and cannot be started again by pushing the ignition button for a period of about 20 to 30 seconds, during which time I cannot steer or stop the vehicle. After about 20 to 30 seconds, the car will turn back on and appear to function normally.

While sitting at a stoplight, my vehicle began chiming along with the following symbols illuminated on the dash: Brake System Warning Light, Antilock Brake System (ABS), Malfunction Indicator Lamp, Electronic Stability Control (ESC). I also received the following warning messages: "Brake System Failure Max Speed 62 mph," "Service Stabilitrak," & "Steering Assist Reduced." When the stoplight turned green, I accelerated at a low speed to get through the intersection so I could safely pull over. When I hit the brakes, I had to jam the brake pedal as far as it would go repeatedly to get the vehicle to stop rolling and eventually stop. It felt as though my brakes went out, and every time I pressed the brake pedal it made a weird popping/air sound inside of the vehicle. I cautiously drove my vehicle at 5-10mph, 4 miles to my sister's home, and every stop sign/stopped car or stoplight I encountered I had to start braking 1/2 a block before because my vehicle didn't feel like it was going to stop. I called the service department at the dealership where I purchased the car 1.5 weeks before, and they provided me with GM's roadside assistance contact to have my car towed. My car was towed to the dealer, 45 miles away that night, and Thursday, 8/29, morning, the service department called me and said that they couldn't find anything wrong with my car - all of the warning lights and messages were no longer on, and the brakes were working as normal. Today is 9/3, and my vehicle is still at the service department as they try to get it to mimic what happened to me on 8/28.