Hello all. New member here. I have a 98 Pathfinder, and recently it fried the part of the ECM that controls the fuel injectors. I want to replace the ecm and have found one on ebay for under $100. The question I have is do I have to reprogram, or reset. It does not have keyless entry, or at least I don't have a key fob for keyless. Any input would be appreciated.