Ok,thanks all of you for your answers and you help. The main issue of all of this is shipping, it is nearly the same price for shipping and the module itself (150$ for france and 1 month delivery). however, we already have a pass through module and the E38 itself, wouldn't it be worth doing it ourselves ? Especially if we want to do it for other engines in the future ? Because if i understand everything well, i'll have to flash the device with SPS ? So, HPTuners will never be in the equation ?