How do you adjust headlights on a 2003 Mazda 6?

To adjust the headlights on a 2003 Mazda 6, first ensure the vehicle is parked on a level surface facing a wall about 25 feet away. Turn on the headlights and mark the center of the light beams on the wall with tape. Locate the adjustment screws on the back of the headlight assembly; typically, there are vertical and horizontal adjustment screws. Turn these screws to align the beams with the marked lines on the wall, ensuring the light is aimed correctly for optimal visibility.