Do I need to run new wiring, or can I tap into existing harness?

These are designed to wire into your factory fog light location if your Altima has the wiring pre-run. If not, you'll need to run new wire from the battery area to the switch location and down to the lights. A basic automotive wiring harness kit will handle the job.

Will these fit the factory mounting points without drilling?

Yes—these use the existing bumper cutouts on your model year. Test-fit before final wire routing to confirm alignment with your specific bumper trim.

What about the bulbs—are they included?

The assemblies ship complete, but confirm bulb type and wattage match your vehicle's electrical spec before installation. Refer to your owner's manual for the correct bulb designation.