Vybz wroteJust tried installing on my 2007 E90 335i as well and got the same issue. Doesn’t seem like the ecu likes the difference between pedal position and expected voltage.I just helped a buddy install this on his 2013, and we can't get the throttle to blip at all. It's reading the signal from both brake and clutch flawlessly but with every calibration the blip led flashes (indicating an issue & a failed calibration). There most likely is truth to what you said regarding a change in pedal electronics, but a work around is probably out there. I'll update this thread if I can find a solution.
If anyone else has this installed on a year model 2009 or later without issue, please feel free to chime in as to what resolved your throttle issue.
Pretty curious to see how anyone got this to work on an E9X car.