[Tech II]

These units are not plug and play units.....they have to be programmed specifically to the car.....I am not sure of the year this happened, but some units are programmed to the vehicle's VIN number, so you can't just take one out of another vehicle and put it in yours....if you try to, when the modules start to communicate with one another, and they don't see the same VIN in the module, they set communication codes and in some cases don't function....