As I've said earlier, my dealer is aware of me having the car tuned and they have even driven the car just to see the performance. They have never made an issue of the tune, and I believe because they are aware that the car is well cared for. If you are really worried about, I would talk to the dealer service manager and see how he feels about it. He may be a car guy that would understand it. I never have had to take the tune out. That's another reason I made the dealer aware that it is tuned...that way they could warn me in advance if they have to reflash the computer, so I can put the stock tune in before the reflash.