In some cases, the workshop transmits data between the original and the new key, while in other cases, they need to connect with the vehicle's interface to obtain the security cipher. The type of procedure is chosen depending on the specific situation and the problem at hand.

Sometimes, the battery for controlling the central locking system is also replaced simultaneously. 

Key duplication involves not only installing a new physical blade but also electronically communicating with the device.

Coding a key with an immobilizer can be more complex than programming a remote for the central locking system. A warning light on the dashboard during the engine start-up can indicate an issue with the immobilizer. 

For newer car models, this service usually requires the expertise of a professional workshop to securely code the car key. This prevents unauthorized copying of the key inside the vehicle.