Headlights are one of the most important safety features on a vehicle. Not only do they allow a driver to see in bad weather or at night, but they alert other drivers to your presence on the road. Keeping your headlights properly adjusted ensures the safety of you and your passengers and prevents oncoming traffic from being blinded by misaligned beams. Adjusting the headlights on your Mazda 6 requires only a few basic tools and five to 10 minutes of time.
Park your Mazda 6 on a firm, level surface with a wall or flat surface in front of the vehicle. Turn on the lights and switch them to their brightest setting.
Pop the bonnet and secure it with the lift bar.
Remove the rubber caps on the adjustment bolts on the back and side of both headlight assemblies. These caps will be made of either black or grey rubber and simply slide off the bolts.
Measure from the ground up to the centre of the light assembly on one of your vehicle's headlights with a tape measure. Place a line of masking tape on the wall in front of the vehicle at the same height. This will be your measuring point for the light adjustment.
Twist the bolts on the back of the headlight assemblies with a 12mm socket wrench to adjust the horizontal aim of the headlights. Clockwise points the light to the right. Counterclockwise points the light to the left. It's easy to eyeball this measurement as you want both lights pointing straight forward.
Twist the bolts on the side of the headlight assemblies with the 12mm socket to adjust the vertical aim of the headlights. Clockwise points the light downward. Counterclockwise points the light upward. Line the lights up with the masking tape you placed on the wall.
Replace the rubber bolt caps when the lights are in the desired alignment. Close the bonnet.
This process is best completed early in the morning or at dusk. It's much easier to see and aim your headlight beams when it is somewhat dark outside.
Always stay aware of pinch points when working around vehicle parts.