This allows the engine to run without an original immobilizer unit and key. Perfect control unit solution for various engine swap, sports cars, boats. Sometimes there is a problem with the original EWS system after the swap. There are times when original immobilizer can refuse the first start. You must send us your m57 control unit or choose one of our warehouses. Look for the used m57 control unit’s at used parts section In case of any questions or uncertainties, please contact us. [email protected]