This application can provide you with the original manufacturer's security code required to activate your Renault car radio or CD player following a loss of power. - Remove the radio or CD player from the dashboard using the manufacturer's recommended release keys - Identify the serial number which can normally be found on a label located on the casing - Enter this serial number to generate the corresponding unlock code for your radio or CD player We are able to supply codes for all serial numbers which are prefixed with letter and three numbers. this application will also work with other radios made by Phillips *Please note this app is not officially recognized by Renault *