The problem i had was the car would not start. Turn on ignition and everything would light up but immobiliser would kick in and prevent a start. Leave ign on for 10-15 min and it would usually start. Was told possibly a fault in ECU. I bought a 2nd hand ECU with key and alarm module and locks and things. I put the ECU on today and still no start. Put the donor alarm module on and it starts every time. Put my ECU back on and no start,so gone back with the donor ECU and Module. So it was either the ECU was at fault,or when you do this senario you need the ECU and module from the donor car,maybe to sync together.