Do I need to remove the factory grille or bumper to install this?

No. This assembly mounts at the existing factory attachment points from behind the headlight opening. You may need to access fasteners from inside the engine bay, but grille or bumper removal is not required.

Will this work as a direct plug-and-play replacement?

Yes. The wiring harness connector matches your vehicle's factory electrical connector. Plug it in, secure the assembly at the mounting points, and you're done. No wiring work needed.

Does the bulb come installed, or do I need to install it myself?

The bulb is included and pre-installed in the assembly. You do not need to handle the bulb during installation — just mount the complete unit and connect the harness.