I noticed that I started getting drivetrain malfunction warnings when I floor the car. Once it hits around 6000 RPM, I get that notification and it gets into limp mode. I've read around about this problem and it seems like everybody has a different conclusion about it (BMW remains mum and says it's a solenoid issue). However I'm freaked out as I've been using stage 1 for a couple weeks now and have to bring the car in.
I obviously will remove the piggy back and have faith that the dealership won't find anything. My biggest concern is that my N20, first production build (2011 November) just doesn't have what it takes to use the BMS Level 1 or that I seriously fucked up the drivetrain somehow.
http://www.f30post.com/forums/showthread.php?t=776020
was the thread i found
except i wasn't going from automatic to manual when this happend, i was just flooring the car.