i need to replace the locking system becouse my keys was stolen from my house but i can not find the immobiliser ecu iv been to my local scrap yard and thay say my car could have 1 of 2 systems but i do not know witch one i have in my car can some one help my find the location of the ecu i have a 2000 ford fiesta mk5 1.25 zetec on a w reg

kaycon, March 2009

The immobilizer is part of the engine ECU and is behind the side trim in the passengers footwell so you have two options replace the ECU with the one from the cars new locks or get an autoelectrician to recode your ECU to the new key

nigel, March 2009