The light sensor for automatic headlights is typically located inside the front of the vehicle near the grille area, where it can detect changes in ambient lighting and adjust the headlights accordingly. In some cases, depending on make and model, the light sensor may be mounted further back near headlight clusters or even lower down by a bumper or fog lights. The location of this sensor will vary between vehicles but always serves to provide an accurate reading of available light conditions so that your car’s automatic headlights can turn on at just the right time. Automotive technicians are trained to identify and replace these sensors when necessary as part of regular maintenance checks.