Originally Posted by frog_a_lot
If it is a plug and play type piggyback chip, you can simply remove it before taking it to service etc
That's what I used to do. Unplug, take to dealer, plug in again. Takes less than 10 min and that only because you have to remove the plastic cover over the engine and the plug is at the back and a bit fiddly to get to.
Dealer never knew that I had the chip. Impossible to detect if removed and well hidden when installed.