Item may need to be programmed.
Some ECM’s need to be re-programmed to work in the car properly. Most often the replacement ECM will need to be re-programmed to the cars immobilizer. Other times the ECM may store the cars VIN number and other important information. Whether you buy a quality used ECM from us or a new one from the dealership; some type of programming may need to be done before your car will start and run properly.
ECM programming must be done by a Dealership or mechanic that has the proper tools to do it. Unfortunately, we do not know which computers need to be programmed and which do not. The only way to know for sure is to consult your dealership or mechanic before buying or installing the replacement.