When you need a car key replacement without the original, the locksmith will typically use two methods depending on the type of key your car requires. For traditional keys, they can manually decode your ignition or door lock to create a new key. For more modern vehicles with transponder chips or smart keys, locksmiths will need to access the Vehicle Identification Number (VIN) and your car’s system to program a new key. The locksmith may also require proof of ownership before proceeding, which is important for security reasons. This ensures that only the rightful owner of the vehicle can have new keys made.