Quote:
Originally Posted by hassmaschine
It should be fine. I suppose a really savvy tech could tell, but they would literally have to be inspecting the binary data for checksums etc. Also, most E90s are way out of warranty by now anyway.
Just make sure they don't update your DME, because of course that will overwrite the file. You can just flash it again of course, but that's a pain.
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Except for reading the binary, the only other way I can think that a tech might discover the tune is to use a Smog check tool that outputs the CVN number. That number is recorded in the 0da file and happens to be the active Checksum.
Might be something a dealer could use on a newer N54 or N55 that 's still under warranty. Don't see them looking on an older N52.