Is it possible to fit and code a VW Passat ECU into our A4's? I know underneath the exterior the cars are alike, but im sure they have their differences which makes this not possible, or does it??? Reason i ask is the charger kit came with the software installed on an ECU, from a V6 Passat, but its fitted onto an encryption type board, so cant be removed and re-used. Other than the above idea, the ECU and software are really no use then. Local GIAC dealer thinks i'd need to send my own ECU to GIAC in US of A to be done there, dont fancy posting it there though, doubt i'd see it again. Im currently in contact with PES also so see what they can offer also.