Can I use RFID on different cars?

Could you please clarify if RFID technology can indeed be utilized on multiple vehicles, or is it specifically designed for a single automobile? Are there any limitations or restrictions I should be aware of when attempting to implement RFID across different cars? Is the process straightforward, or does it require specialized knowledge and equipment? Additionally, are there any potential security concerns or risks associated with using RFID on multiple vehicles? Your insights would be greatly appreciated.