Originally Posted by doug_999
It only firms up the suspension on the non M X5/X6. Even then it is "barely" noticeable. No change in steering or throttle or shifts.
Other BMW models do various things , but not this one. (And I'm not sure about the X5M/X6M)
Correct. It increases the damping stiffness and increases the swaybar resistance. I think it's very noticeable on mine.