Quote:
Originally Posted by totalone
I believe ECU will track boost level. It won't say that it was due to jb4. They would have to prove it that you used piggy.
I used jb4 before and had no issues claiming warranty. It was audi not bmw. If you run map3, I doubt sending will harken to engine.
Me personally wouldn't be afraid to use jb4.
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Plenty of discussion on this in the past. The ECU will track and flag any modifcations. Whether its BM3 / JB4 / custom tune etc