Remove the old headlight. This may involve removing the screws or bolts holding the headlight in place, as well as disconnecting any electrical connectors.
Prepare the new headlight. Check that the new headlight is compatible with your vehicle and remove any protective covers.
Install the new headlight. Connect the electrical connectors, and then secure the new headlight in place.
Test the new headlight. Turn on the headlights and check that they are functioning properly.