I'll be the first to disable this.
After hitting a few deer at highway speeds, I don't want some balloon going off in front of me while I focus on maintaining control and stopping safely.
Because the x5 is taller, I am not worried of the deer killing a passenger through the windshield vs a sedan.
So for me, the benefits don't outweigh the risk to my family.
People don't walk in the street where I drive, animals do!