there is no way that bmw dealerships will detect that you had a plug and play chip installed on your car. Just remove it when you take the car for service or when your car needs to go to the dealership for any reason. There is no way of proving that you had installed a chip on the car if the hardware is not there when you take the car in, they might suspect but will never be able to proove it
I have had one in my merc w204 C350 CDI, the car limped and showed engine warning. Unplugged the chip and drove into the dealership to have them clear the warning, then plugged it back with a lower setting. the chips do not work
well racechip pro2 does not work and if all chips are the same, then all of them does not work :thumbdo: