The only difference in the FRDN-POD/S and the FRD03-POD/S is the wiring harness that comes with each device. Some Ford vehicles could have one of two different radios The only way to tell which device you need is to first pull the factory radio out of your vehicle BEFORE you buy the interface. So as an added bonus and another reason to buy from Logjam Electronics, we supply both wiring harness for the same price.