It is like this on all newer BMWs, and I think nobody has found a cure for it. Hartge has a throttle booster, and I would assume that there should be no issues with it, coming from a reputable company.
I have done some testing with it, and I think the power output is the same at full throttle in Comfort and Sport mode. The difference is the pedal mapping.
It is also worth noting that it is impossible to test the power in a 2WD dyno in Sport mode for the same reason.
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