Every car now has a OBD2 port or a plug which you can hook up a computer for diagnostic checkups and other use. Most cars have it under the dash on the driver side. By hooking up to the OBD2 port, it can communicate with the ECU and we have the hardware to reflash the ECU through the port now.

Some customers would prefer not to have their ECU opened up or have the chip unsoldered and reprogrammed and soldered back on. The OBD2 solution is the way to go if customer prefer nothing to be touch other than the program.

Hope this clear things up.
Gary