Anti lock braking system, abbreviated as ABS, is an advanced car security system fitted in many of the modern Indian cars to prevent skidding. An ABS system mainly comprise of electronic control unit, four wheel sensors, hydraulic valves and vehicle brakes. Four wheel sensors help in scanning the speed of each wheel and if the control unit reads low speed then other wheels are locked automatically. There are mainly three types of anti-lock brakes: four channel four sensors ABS, three channel three sensors ABS and one channel one sensor ABS. This helps in monitoring rotation speed of each wheel and ensures that each wheel achieves maximum braking force. This helps in monitoring the speed of individual front wheels for maximum braking force and combined monitoring of rear wheels which reduces the braking force.