The contact owns a 2017 Buick Regal. The contact stated while driving 80-85 MPH downhill and depressing the brake pedal, the brake pedal was rigid, failed to lower as needed, and the vehicle failed to respond. The Brake Assist warning light was illuminated. The contact stated that upon depressing the brake pedal harder, the brake pedal slightly travelled down and bounced back. Additionally, the steering wheel shuddered, and the vehicle failed to respond. The contact allowed the vehicle to gradually decelerate independently. The contact was able to drive to her destination at slower speeds. The contact related the failure to NHTSA Campaign Number: 22V465000 (Service Brakes, Hydraulic) however, the VIN was not included. The vehicle was taken to the dealer, where a fee was charged for diagnostic testing. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 165,000.

- Victorville, CA, USA

The contact owns a 2017 Buick Regal. The contact stated while driving 35 MPH and approaching a traffic light, the contact depressed the brake pedal, but the vehicle failed to stop as needed. The contact stated he used the parking brake to stop the vehicle. The contact stated that the brake assist warning light was illuminated after the failure had occurred. The contact continued driving the vehicle at 5 MPH to a nearby gas station and continued to use the parking brake to stop the vehicle. The vehicle was not drivable. The contact towed the vehicle to the local dealer, where it was diagnosed with needing the brake vacuum pump to be replaced. The vehicle was not repaired. The manufacturer had been informed of the failure. The failure mileage was 51,528.

- Virginia Beach, VA, USA

The contact owns a 2017 Buick Regal. The contact stated that while driving at 70 MPH, the brake pedal was depressed and traveled to the floorboard as the vehicle rear-ended another vehicle. It was unknown if any warning lights illuminated. The contact stated that no injuries were sustained. A police report was filed. The vehicle was towed to a collision repair facility. The contact stated he was unaware of the cause of the brake failure as well as what was repaired. The contact stated that the failure reoccurred in August of 2022 while driving at 70 MPH, the brake pedal was depressed and traveled to the floorboard as the vehicle rolled to a stop. The contact was once again unaware of any warning lights. The vehicle was towed to an independent mechanic where the vacuum brake booster and sensor were replaced. The contact stated that the failure reoccurred for a third time in April of 2023 while driving at 70 MPH, the brake pedal was depressed once again and traveled to the floor as the failed message " Vacuum Pump Brake Booster" was displayed. The vehicle was able to be driven to the contact's residence as he was awaiting a tow to the dealer for diagnosis and repairs. The manufacturer was notified of the failure and informed the contact that the vehicle was not included in a recall and opened a case. The contact was relating the failure to NHTSA Campaign Number: 22V465000 (Service Brakes, Hydraulic) however, the vehicle year, make, and model was not included. The failure mileage was 70,509.

- Mokena, IL, USA

The contact owns a 2017 Buick Regal. The contact stated while her son was exiting a parking spot at 5 MPH and depressing the brake pedal, the vehicle failed to stop the vehicle. The contact stated no warning light was illuminated. The contact stated that the vehicle rolled to a stop. The driver took the vehicle to an independent mechanic and was informed that the vacuum pump needed to be replaced. The vehicle was repaired but experienced the failure a second time on 9/17/2022. The contact took the vehicle to another independent mechanic and was informed that the vacuum pump needed to be replaced a second time. The vehicle was repaired. The contact stated that the local dealer was notified of the first failure but not the second failure. The manufacturer had been informed of the failure. The failure mileage was approximately 76,000.

- West Newton, PA, USA

The contact owns a 2017 Buick Regal. The contact stated while driving 80 MPH, the brake pedal seized while depressed, preventing the vehicle from immediately stopping. The brake assist warning light was illuminated. The vehicle was towed to the dealer where it was diagnosed with a brake vacuum pump failure. The dealer informed the contact that the exhaust camshaft needed to be replaced and the computer needed to be reset. The vehicle was not repaired and remained at the dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 65,000.

- Portland, OR, USA

The contact owns a 2017 Buick Regal. The contact stated that while driving at an undisclosed speed, the brake assists unexpectedly failed, and the brake pedal was firm while depressed. The contact was able to pull over and was awaiting a tow. The vehicle was not diagnosed nor repaired by an independent mechanic or dealer. The vehicle had previously been serviced by an independent mechanic for a vacuum pump replacement. The manufacturer was not made aware of the failure. The failure mileage was 139,790.

- Gainesboro, TN, USA