2017 Chevrolet Bolt EV brakes problems

On August 17th, 2025, my wife was driving our 2017 Chevrolet Bolt EV at low speed, pulling into a parking spot. The vehicle suddenly accelerated forward with enough force to cause significant damage to a fixed barrier. She does not recall pressing the accelerator at that moment. The degree of acceleration was disproportionate for a brief accidental press. Immediately after impact, smoke or dust was visible rising through the center console area.

There is a rapid tapping noise coming from the brake booster upon opening the door or hatch. Tapping the brakes will make the noise stop. For a few weeks this would stop the noise until the next occurrence after sitting for hours. It has progressed so that the tapping will return as soon as the brake pedal is released and continue while driving. Upon parking, the noise will persist for up to a couple of minutes and then stop. Problem continues to this day (3 march 2021) n.b.