Find_my-Audi

I've read and seen alot online about different items being coded and swapped with realtive ease..... I know a guy with a Audi tech system that can make changes and maybe add bits but my question is what has anyone been able to complete successfully and at what cost? Hardware changes or Purely coding?

Hello Guys, A any help if anyone is on here or has seen my old vehicle.... Sold it a long time back now and saw that is still being MOT'ed and Taxed. Would love the chance to find it and maybe own it again one day...Sad I know!! Red Audi Gt5s Coupe Reg C186 SUY. If not then I will keep looking to find my nxt Audi Classic!!