Multiecuscan

Hello, I wanted to install a used ECU because I have a permanent error in the ECU, but I don't know how to get the immobilizer reprogrammed.

Vehicle: Fiat Punto Evo 1.4 Turbo Multiair
ECU: 51868976 [199 1.4 16V T/C 135CV EURO5]

To my knowledge MES can not do this.

You need either:

1) a virgin unused factory fresh reset/blank ECU
or
2) the ECU and the keycode unit from the donor vehicle and ideally one or more keys from the donor vehicle

The ECU and key code unit "pair" themselves to each other. Once paired they become a married to each other.

or you could contact locksmiths who make car keys, often they can virginize used ECUs or give contacts who can.