Do I need any special tools or hardware to install this?

Most of the work is access — you'll need basic hand tools to remove the factory assembly and unbolt the new one into the same mounting points. No additional fasteners required; factory bolts reuse.

Will this work with my vehicle's existing wiring?

Yes. The factory connector matches your Altima's harness directly, so you're plugging straight in without adapters or splicing.

Does this come with a halogen bulb installed?

The assembly ships ready to mount. Bulb status not specified — verify before install so you're not caught without one on the road.