Originally Posted by Zinister
I'm just worried that it might be detectable if they hook up to the scanner (DIS) and are able to tell if there was something there on the V81 software.
We'll have to wait until someone's turbos blow and the dealer really looks hard for evidence of piggybacks. I would be afraid they could record some type of evidence from the ecu during scheduled service but not tell you until you try to have something major repaired under warranty, a couple years down the road.
I realize people on here are saying piggybacks can't be detected but not one person is so confident they've offered to pay for repairs if the dealer (or bmw) does have a way to detect them.
The good thing is the cars are over engineered and the turbos seem to be holding up pretty well running such high boost.