Auto repair and the stuff nobody tells you
The smell will be unmistakable. This circumstance also warrants brake repair as soon as you can get your car to your technician. You may have rotor surface issues if either your brake pedal or your rotor itself starts vibrating. If your brakes start squealing when you press on the brake pedal, get your car into your favorite repair shop to determine whether brake repair is necessary. If your brakes squeal after you have released the pedal, have your brake wear indicators checked as they may be scraping against the rotors.