Tuners for other vehicles I've had, have warned about flashing the ECU with the tuner installed. They claim if the dealer flashes an update to your vehicle, it will erase your tune, and likely cause your tuner to "lock itself," since it was paired to the ECU before the update, and won't be after. Not 100% sure of the truth to all of this, Diablosport sells a cap that says "DO NOT FLASH" for the OBD2 port. Maybe someone can clarify?