Will this bolt straight onto my Sentra without modification?

Yes. This assembly mounts at the factory points—no drilling, brackets, or wiring changes. Your existing harness plugs in and you're finished.

Is the bulb included with this headlight?

The assembly ships without a bulb installed. You'll need to source the correct bulb type for your year—your owner's manual or a parts retailer can confirm the spec.

Do I need to paint or prep this before installing?

No prep needed. The lens arrives ready to install as-is. If you want to customize the appearance later, you can paint or modify, but out of the box it's installation-ready.