i have the cobb ap and fswerks intake. i have taken my car in for a faulty fuel pump (sounded like it was going to die at any moment) and a few thousand miles later for a immoilizer malfunction. both of which they did not say a word about a tune. keep in mind i did flash back to stock and remove the AP. they did mention that my headlights were throwing fault codes as i replaced them with HID lights. guess my point is if they wanted to dig in about the tuner they would have done so sneaking around the ECU.