Tip - How to Adjust a Headlight on a Mazda 3 | eHow

You can adjust the headlights on your Mazda 3 by using the 10mm adjustment bolt on the backside of the headlight housing assembly. This bolt will allow the only adjustment available on the Mazda 3. Adjusting your Mazda 3's headlights is necessary whenever you replace the housing assembly. If you've never done this job before, it may take you 20 to...