Do I need to buy a bulb separately?

Bulb is not included with this assembly. You'll need to source the correct bulb type for your year — verify the spec before ordering so you have it ready on install day.

Will this bolt straight to my vehicle without any modification?

Yes. This assembly mounts at factory points with no drilling or bracket work. Bolt it in place and connect the electrical plug — that's it.

What if the headlight doesn't seal properly after installation?

Test-fit before finalizing. If gaps appear around the housing, check that all mounting bolts are tight and aligned. If seal issues persist, contact support with photos for next steps.