Buick Envision brake failure problems

Filed Oct 27, 2026 · Acceleration, Brakes · 22,000 miles · UT · crash · 1 injury

The contact owns a 2024 Buick Envision. The contact stated that while driving 15-20 MPH, the brake pedal was depressed and the brakes failed to respond as needed, causing the vehicle to crash into a residence. The contact shifted into reverse(R), and the vehicle crashed into a porta-potty at a construction site. The vehicle shifted into park and stopped. The contact stated that the Driver Assist feature was operational during the failure. The contact sustained bruising and soreness to the right side of the body. The vehicle was drivable after the failure. The approximate failure mileage was 22,000.

Filed Jun 25, 2026 · Brakes · IL

I was driving ~72 MPH on the interstate and my car suddenly downshifted and the dash read “Speed limited to 62 MPH”. I took the nearest off ramp and the brakes completely failed. The dash initially read “service transmission” and “service breaks”. After restarting the Buick Envision, the MyBuick App diagnostics stated “service breaks” only. The car was towed to the dealership this date. I have not heard from them on what has caused the brake failure yet.

Filed Aug 27, 2024 · Brakes, Electrical · 1,500 miles · FL

The contact owns a 2023 Buick Envision. The contact stated that while driving approximately 15 MPH and attempting to stop the vehicle, the brakes failed to immediately activate while depressing the brake pedal. The contact attempted to steer the vehicle to prevent crashing into the vehicle in front and became aware that the vehicle had lost power steering functionality. The contact had to depress the brake pedal to the floorboard for the vehicle to come to a stop. The contact stated that several unknown warning lights were illuminated. The contact turned off and restarted the vehicle to continue driving. The vehicle was taken to the dealer where it was diagnosed that the brake module had failed; however, the dealer was unable to determine the cause of the steering failure. The contact stated that the brake module had been replaced. Approximately one month later the failure recurred while driving approximately 25-30 MPH, the failures reoccurred while decelerating a stop light. The contact depressed the brake pedal to the floorboard to stop the vehicle. The vehicle was returned to the dealer and the vehicle was diagnosed with instrument cluster failure. The vehicle had not been repaired. The manufacturer was made aware of the failure. The failure mileage was 1,500.

Filed May 6, 2024 · Brakes · IL

2023 Buick Envision. Brakes failed. This was a new car driven 1k miles. There was no warning notification, no alert and no dashboard lights prior to this incident. Of course I had expected the normal brake resistance when I stepped on the pedal. Instead, my foot sunk closer to the floor. I pressed the pedal as hard as I could a few times until it slowed to a stop. I do not drive fast so this was to my advantage. I was later told that the Allstate Milewise device that I had been using was not recommended but in this case it was not a factor. The service manager shared documentation that there was potential system conflicts with this. This was not disclosed to me with my 2020 Envision. Therefore, I continued to use it in the 2023 vehicle. I forwarded the information to Allstate, so they could investigate further. I received call back saying to return the device and find alternative insurance options. When I was told to pick up my car, I asked what was found to cause the brake failure and to highlight the fix in the receipt. A reset of the software was the final fix: LOOKS LIKE ALL MODULES ON CAN BUS 2 LOST BRAKE CONTROL MODULE TESTED CHARGING SYSTEM WITH THE DCBS AND PASSED PERFORMED GLOBAL RESET SCANNED ALL MODULES DID FIND UPDATE FOR THE SERIAL DATA GATEWAY UPDATE MODULE 45YY212842554” I was told that until this happens again that is all they can do.

Filed Oct 18, 2023 · Brakes · MO

I was returning home from shopping. As I approached a stop sign, I applied the brakes and the brake pedal went completely to the floor: Fortunately, I was able to stop before entering the intersection. I had the vehicle towed to a nearby Buick dealer to determine the cause of the brake failure. I was told the left front brake line had a hole in it causing total loss of brake fluid - cause unknown. There were no warning lamps or other symptoms of the problem prior to the brake failure. The brake line was replaced by the dealer at significant cost to me.

Filed May 4, 2023 · Brakes · MD

Driver front brake hose burst, mechanic placed back in packaging for me to keep for inspection. Fortunately it busted coming to a stop for traffic light while already slowing, then could slowly drive off roadway into a parking lot, brake pedal went to the floor due to loss of fluid and could have been catastrophic for my wife or other motorists. My mechanic replaced with factory GM hoses on both sides. My mechanic is a state of Maryland licensed inspection station and confirmed the failure. No prior warning, Onstar records will confirm, after the fact, of lights and warnings of brake failure.

Filed Oct 28, 2022 · Brakes, Electrical · PA · crash

Brakes failed while coming to a stop causing me to crash into the back of someone. Also all dash and radio and shifter lights went out and came back on at the same time brakes failed. Brake issue still not fixed by GM Buick.

Filed Aug 29, 2022 · Brakes · OR

While driving my vehicle at 55mph on a country road, I went to brake, and then realized that I had no brakes. I had to coast to a near stop and put everything I had into pushing the little bit of brake pedal clearance left to the floor to come to a complete stop. I had NO warning signs or dash lights before this happened. Once I turned my car off and then back on, the service brake assist light came on, followed by the engine light. Had any cars been in front of me to stop, I surely would not have been able to stop with what little brakes I had left. My brake assist vacuum pump was removed, and inside there were many pieces of the part in there. This part is available for inspection. Again, had this happened in traffic or with anybody stopped in front of me, this would have had a completely different outcome. I had to have my vehicle towed 70 miles for repair. When the part was removed, there were no visible signs of any of the seals leaking.

Filed Aug 25, 2022 · Brakes · MO

The brakes went to the floor with very little stopping power. Took the car to the dealer and the left brake line failed. The dealership said they thought since there was minor damage to the left front of the car, that this was the cause of the failure. The brake line was replaced with an aftermarket part and brake lines flushed and replaced. We had another instance of brakes going to the floor with little stopping power. This time the right side brake line failed. The dealership noticed that there was no damage on the right side of the car to cause this failure. The dealership told me they sent an email to corporate and checked for a recall on the brake lines. If this car would have been on the highway when either of these failures took place, we might be having a different conversation. I have asked the dealership to find out the cost of replacing the rear brake lines. Dealership involved in repairs. Reed Buick GMC 9550 NW Prairie View Rd Kansas City MO 64153 Phone 816‑436‑6300

Filed May 23, 2022 · Brakes · IL

We own a 2017 Buick Envision with approximately 42,000 miles on it. While on her way home from work, my wife experienced brake failure that almost caused her to be in an accident. I checked the fluid and the brake fluid level was low. I added fluid and it leaked out as soon as the brake pedal was depressed, which to me points to a failed brake line.