Ahh.. sorry i didn't get on here to read this. It seems lots of others experience nausea in the X too. My GF drives an 06 3-series, it's wicked stiff so I'm not sure if the stiffness is what is making her sick. My buddy who recently complained drives a pickup, not sure how that would affect him, but I know he is an avid boater and never gets sea sick .

I don't have adaptive drive, nor sport package, and I drive slower now than I did when I had my E53. Again, no complaints EVER in the E53, my GF actually misses it, and thinks it was a better car all around (I disagree).

I'm guessing it is the turbo, since there is a delayed but then very quick acceleration when you step on the pedal.