Fair enough, to be honest, I doubt everytime I car comes in for warranty the technicians think *this one must be remaped*
re-maps done properly should reset the flash counter on the ecu so that it looks untouched.
A mate of mine bought a SEAT Leon that had a cheap re-map. He didn't even know. He did complain about rubbish fuel economy. Guy from upsolute noticed straight away as ECU hadn't been left in a 'safe' mode.
He also commented about the settings for feulling and turbo that had been tweaked were not done in a way to compliment others. So using a reputable firm is the best option in my opinion.
unless a garge was to drive a re-mapped car and std back to back in exactly the same way i doubt they'd notice.
TBH technicians shouldn't be driving cars hard unless asked too.
our A3 is going in today to get airbag light fault checked. We shall see what they find