Quote:
Originally Posted by wordsworth03
There was a user on here who reported that the dealer could detect that the ECU was flashed, so I’d be cautious if you are concerned about your warranty. The piggyback is much less likely to be detected if you remove it prior to any service at the dealer.
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Both are detectable. They can see the elevated boost levels with a piggyback. It's unlikely that they would dig that deep. But obviously, a piggyback can be seen with the naked eye. A tune cannot.