Quote:
Originally Posted by Poochie
Every time the ECU's original software is flashed outside of the factory, even by a franchise dealer, it leaves a permanent trace, a number increment to be exact, showing the how many times it was changed.
There is not way around that and is a telltale sign the software was altered.
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BMW has even evolved beyond a simple tune counter and logs boost and TQ request numbers (modern engines are TQ demand based not load based as before).
If you are outside of these values (which every tune will do) then boom warranty is gone.