A Smarty Tuner is a type of chip that allows you to tune your vehicle's computer for increased performance. While the tuner itself is not vin-locked, some tuning software may require the VIN number of the vehicle in order to be used with it. This means that if you have a Smarty Tuner and try to use it on another vehicle, it will likely not work since the software won't recognize the new VIN number. However, many aftermarket tuning companies offer reflashing services which allow users to transfer their existing tunes from one vehicle to another without needing a new license or any other changes made by the manufacturer. So while technically speaking, a Smarty Tuner isn't vin-locked, it may still need your specific VIN number in order for its accompanying software to work properly.