welcome to the board. what is your problem? Lights going up and down? Most likely your front sensor arm is in the wrong position. Jack the car a little, get underneath, see what direction it's going, jack it up to full extension, lower the car and make sure the arm goes the other way.
anyway, here are the parts and illustrations.
RealOEM.com * BMW E53 X5 3.0i HEADLIGHT VERTICAL AIM CONTROL SENSOR