When replacing a car key without the original, your vehicle identification number (VIN) becomes an essential tool in the process. The VIN, a unique 17-character code assigned to every vehicle, allows locksmiths or dealerships to verify the car’s specifications and create a new key based on this information. The VIN helps identify the make, model, and year of your car, which is crucial when ordering replacement keys. For cars with transponder or smart keys, the VIN is also used to program the new key to your car’s security system. This ensures that the key will work properly, and the vehicle will recognize it. In situations where you’ve lost all keys, the VIN is key to getting a car key replacement that’s tailored to your vehicle.