The cost of a brake repair varies based on the make, model and year of your vehicle along with the severity of your problem. Your cost increases if ABS Moter and Wheel Sensor are gone bad too....
When it is functioning correctly the ABS system is designed specifically to prevent the wheels from locking up during heavy braking, preventing loss of traction. However, there can be certain instances where a faulty ABS module can behave erratically, causing your brakes to lock up even under normal driving conditions.