Adaptive Head Lighting
WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
Vehicles equipped with adaptive front lighting have a module (located on the bottom of the LH headlamp assembly) to control the left/right aiming of the headlamp bulbs. Depending on the inputs received (steering wheel angle and vehicle speed for example), the adaptive front lighting module can change the angle at which the headlamps are aimed (left or right) to improve nighttime visibility around curves.
There are sensors and motors within each headlamp that the module uses to control the angle of the headlamp beams and are not repaired separately.