This project is entitled as “User Altering System for Vehicle Accident Detection System”. In Human Life vehicles are playing an important role in day to day life while using vehicle there may unavoidable accident occur so, this system may help the people to secure. This project aims at finding the occurrence of any accident and reporting the location of the accident to the previously coded numbers. The form of latitude and longitude coordinates through SMS using GSM technology is used to intimate the vehicle position is to identify. The location spot is retrieved using Global Positioning System which is a navigational system using a network of satellites orbiting the earth. Such as vibration and fire detectors detect signal in case of an accident occurrence and send a signal to the connected microcontroller. The controller, in turn, operates the relay to blow the airbag and automatically lock the brakes. Meanwhile, a message reaches to the necessary help and thus ambulance service and required aid can reach in the shortest time possible. This system can also aid companies in the rental vehicle business to keep a track of the vehicular activity by sending the message at regular intervals to the authorized numbers.