IOT based smart Fuel Monitoring and Prevention system is designed for real time vehicle fuel management and security [4]. The system is implemented using an ESP32 microcontroller, integrating a resistive fuel sensor and a GPS module for accurate fuel level measurement and real time location tracking [7]. The fuel sensor continuously monitors the fuel and converts analog signals into digital values for precise display. Fuel theft is detected by analyzing abnormal fuel consumption patterns and sudden fuel drops [2]. The ESP32 uploads fuel location data to cloud platform through Wi-Fi [6]. Alerts regarding low fuel, theft detection, and vehicle are sent to the user through mobile applications and the email notification. The smart monitoring system enhances fuel security, improves fuel efficiency, and provides remote access, making it a cost-effective and reliable solution for modern two-wheeler and fleet management applications.