The various embodiments herein provide a reverse gear sensor and alert device for a vehicle comprising an electronic hub, a motor and a tail. The electronic hub comprises a control electronics circuitry (CEC), an audible buzzer, and an ultrasonic buzzer. The electronic hub is installed over a base frame attached to a rear body of the vehicle and is connected with a power source. The tail is attached to the electronic hub through the motor. The tail comprises a plurality of illumination members fixed on an outer surface of the tail and are powered through the motor. The power supply allows a flow of current to the motor on detecting a reverse gear activation in the vehicle. The current flow energizes the motor leading to a protrusion of the tail out of the vehicle. The plurality of illumination members, the audible buzzer, and the ultrasonic buzzer are activated on activation of the reverse gear.