Lets see stated on the CAPA site: One Box can be cleared and used on another car for as many as 5 cars, so a $1,297 investment over 3 to me this requires the reset? As stated line C capa site: C: The flash tuner can be changed over to a new vehicle, it must be cleared using software available from CAPA. This process can only be performed 5 times. Then it must go back to SCT / USA for a Reset. The unit is vin locked A: Once the Flash Tuner has been used to program a vehicle, it will be VIN locked to that particular vehicle until the programming has been returned to the stock setting. As per CAPA site http://www.capa.com.au/ford_flash_tuner.htm