Human life spans are shorter today than they were in the past because automobile usage is increasing by the day, and the death rate from accidents has risen dramatically. Many accidents occur as a result of brake failure, unconsciousness of the driver, and overspeeding of the vehicle, thus controlling the brake automatically helps decrease the impact of an accident. The bumpers which are currently used in vehicles are of rigid types. These bumpers have a specific capacity and when the range of the accidental force is very high then the bumper fails and the force is transferred toward the driver & passengers. To overcome this, our project is designed with an ULTRASONIC SENSOR, BLUETOOTH CONTROLLER, and ARDUINO for the effective function of the braking system. The prototype has been made and successfully tested.