Electronic Audi A4 Injection

Hello everyone, I have the sgte. Problem, the Audi A4 injection pump broke down, bought a used and when placed it does not recognize the computer, it tells me that it is not installed.
The person who sells it tells me that you have to program or encode it so that the Audi computer detects it.
I would like to know if that is correctly or simply the pump does not work.
The bomb is a Bosch.
Thanks from now.