While keyless cars have many advantages, such as convenience and security, there is one significant disadvantage: if the key fob is lost or stolen, the car cannot be driven.  This can be a major inconvenience, especially if the owner does not have a spare key. Additionally, if the key fob is not correctly shielded from RFID scanners, thieves can clone the key and gain access to the car. As a result, keyless cars are not as secure as they initially seem.