Do I need to buy the bulb separately?

The assembly comes without a pre-installed bulb. You'll need a halogen bulb compatible with your 2014-2017 Mazda 6 — your local parts store can match it in minutes.

Will this bolt straight onto my car?

Yes. This assembly mounts at factory points using your existing bracket and hardware — no modifications needed. Plug the connector and you're done.

What if the headlight doesn't work after installation?

Check the bulb first — it's the most common cause. Verify the electrical connector is fully seated. If issues persist, confirm your vehicle's year and model matches the listing before contacting support.