hi, maybe this part of the forum is not appropriate for this question, but some administrator will move the post to his section.

First you must purchase a compatible cable with flasher nefmoto if you go to use it, or galletto or similar type cable. This will help you to read your ecu by obd port.

if you are interested in doing directly to the ecu you can modify some of the above cables to make it a arness, or buy a ktag type, or the like programmer. With this option, you can recover your ecu if brick, and also you can easily read the eeprom to make immo off and more things described here forum. it is investing a lot of time reading, learning and testing. here are many people who will be glad to help you learn. greetings and good luck