The contact owns a 2016 Chevrolet Malibu. The contact stated that while her dad was driving at various speeds, the vehicle independently accelerated and decelerated. The contact stated that the vehicle was speeding up and then slowing down independently. The brake pedal was depressed and went to the floorboard, causing the vehicle to crash into a pole, however, the air bags did not deploy. There was no injury sustained. A Police report was not filed. The vehicle was taken to an independent mechanic, who was unable to determine the cause of the failure. While the mechanic was driving the vehicle, the vehicle drove as designed. However, the contact stated that while her dad was driving at an undisclosed speed, the failure recurred. The vehicle was taken back to the independent mechanic and the mechanic stated that the wheels were extremely hot. The vehicle was taken back to the same independent mechanic and the contact was informed that the brake vacuum pump needed to be replaced. The contact called the local dealer and was informed that there were no open recalls on the VIN. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 14,000.

- Fall River, MA, USA

The contact's finance owns a 2016 Chevrolet Malibu. The contact stated that the brake pedal would hardened when depressed without warning. While driving at 15 MPH, the contact crashed into another vehicle due to the hardened brake pedal. The driver side air bag failed to deploy as needed; the air bag slightly popped out of place but did not deploy. A police report was filed; no injuries were reported. The vehicle was towed to an independent mechanic where the mechanic verified that the vacuum pump needed repair. In addition, the contact mentioned that the vehicle would independently downshift while driving at a high rate of speed as the "engine reduce speed" warning message would appear on the instrument panel. The dealer and the manufacturer were both notified the failures; a case was filed with the manufacturer. The vehicle had yet to be repaired. The failure mileage was approximately 70,000.

- Arcadia, IN, USA

The contact owns a 2016 Chevrolet Malibu. The contact stated that while her daughter was driving at an undisclosed speed, the brake pedal was firm while depressed. Additionally, the vehicle made abnormal grinding sounds with the check engine warning light illuminated. The vehicle was taken to the dealer where it was diagnosed with brake vacuum pump failure. The dealer replaced the brake vacuum pump. The manufacturer was not made aware of the failure. The failure mileage was approximately 78,000.

- Reynoldsburg, OH, USA

The contact owns a 2016 Chevrolet Malibu. The contact stated that while driving, the brake pedal was depressed and failed, causing the braking distance to be extended. The contact stated that she had to pump the brake pedal for the vehicle to slow down and stop. The check engine warning light illuminated and remained illuminated. The vehicle was taken to an independent mechanic and was diagnosed that the brake electronic control module failed and needed to be replaced. The contact called michael bates Chevrolet Inc, (23755 allen rd, woodhaven, mi 48183), and informed the dealer of the failure. The dealer informed the contact that the vehicle was not included in a recall and was to schedule an appointment to have the vehicle diagnosed. The manufacturer was made aware of the failure and provided a case number. The failure mileage was approximately 82,000.

- Wyandotte, MI, USA