Choosing the correct type of key is critical for ensuring both the security and functionality of your car. When replacing a lost or broken key, it’s essential to know whether your vehicle uses a traditional key, transponder key, smart key, or a key fob. If you attempt to use the wrong key type, it could result in failure to start the car or even cause damage to the ignition system. Additionally, a car key replacement service can ensure that the new key is programmed properly to work with your vehicle’s security system. For example, transponder keys require a unique code to communicate with the car’s engine control unit (ECU). Without proper programming, the car won’t start. A professional locksmith or dealership will have the tools needed to create the right type of key for your vehicle and make sure it functions correctly.