As for the survey done on the drunken and driving accidents are becoming more day by day. To overcome this issue we can initialize the alcoholic sensor and seat belt sensor to the vehicles. If we place an alcoholic sensor in the vehicles that sensors will identify the percentage of alcohol containing in the body and allow the engine too gets starts if the percentage of alcohol is more than the limit ignition will be blocked by the sensor. To sidestep the drunken driving accidents our proposed work may be useful to society. This system is integrating on the alcohol sensor, seat belt sensor with a microcontroller, relay switch and battery. The alcohol sensor used in our project is MQ-3 which detect the presence of alcohol content in human breath. Vehicle ignition system gets power from the battery through a relay switch. The ignition system will operate based on the level of blood alcohol content(BAC)in human breath detected by the alcohol sensor and if the seat belt is not used then the sensor will not allow microcontroller supply power to spark plug.