Hello, I own a Focus MK1 1.8 TDCi from 2002, 3 doors. Currently, the car only has a central locking via the lock. It occurred to me that maybe I could replace the central locking module with a version that has remote locking (original Ford). I would like to know if someone has already tried it, what is the identification of such module and what is the replacement procedure. I know I still have to get a key fob that has to be programmed. In addition, I am interested in whether it is possible to install a control unit from a 5-door Focus on my 3-door and still function normally.

P.S. Apologies if such a topic already exists on the forum. I searched but couldn't find it. If there is, please link it.