I purchased an unlocked PCM a few years back for my 2015 SPS. At the time of purchase they company asked for my mileage and VIN for the PCM. The PCM was never installed. It never made it out of the box. Will the PCM need to be reflashed if I were to sell it for it to work for someone else? I was always under the impression that the PCM became "married" to the car once it was installed.