The part you circled is the HID auto-leveler.

It takes the input angle of the front and rear suspension and adjusts the HID level to suit - so you dont blind people when you go over a speed bump or crest of a hill !

You can try and see if the front or rear connection is loose - its a 10mm sized nut holding on so try it out. Do you have adjustable control arms ?( camber kit) ? If loose or adjusted they might be alittle loose