Sorry if I am hi-jacking this thread, but if weasel is out there? a response I had from one tuning company as to whether or not ecu remaps were detectable is as follows:

"Hello

The dealers tools are not as sophisticated as our tools all they are able to do is diagnose problems with cars not changes in ECU software... If your service person was correct we would not be in business and BMW would not be investing in the EDC17 Tricore locked ECUs to try and stop tuners, which Alientech have now unlocked with the EDC17 adapter..."

So weasel or anyone ?can the tweaks be detected?