In this age of soaring vehicle thefts, vehicle safety has become a matter of prime importance. Investigators owe this increase in thefts to the lack of proper parking spaces in residential areas and lack of availability of sophisticated security devices. As a solution to the aforementioned problem, we have developed a prototype model of fingerprint based security system for vehicles by interfacing Fingerprint sensor module R307 along with Arduino Uno. A person can start the vehicle, but only upon fingerprint authentication can the person put the vehicle into motion. On recognition of the fingerprint, the valve fixed in the outlet of fuel tank opens, thereby allowing the flow of fuel to the engine.