The contact owned a 2019 Mini Cooper Clubman. The contact stated while driving at 45 MPH with her 3 years old son in a car seat located in the rear seats. and coming to a stop, the brake pedal was depressed but failed to respond and vibrated while emitting an abnormal ticking sound. As a result, the vehicle crashed into the trailer hitch of the occupied vehicle before her. There was no warning light illuminated. The air bags failed to deploy. The contact sustained severe whiplash, memory loss, fatigue, headaches, pain and bruises on the chest. The contact had been seeking medical assistance and was scheduled for an MRI. The contact's son did not sustain any injuries. The contact stated that the other driver did not sustain any injuries and was able to continue driving. The vehicle was towed to a tow yard where it was totaled. A police report was filed. The dealer was not notified of the failure. The manufacturer was not notified of the failure. The failure mileage was approximately 32,650.