Will this bolt directly into my Santa Fe without any wiring changes?

Yes — it uses the factory mounting points and connector. No harness modification needed. Just unbolt the old unit and bolt the new one in place.

Do I need to buy a bulb separately?

Bulb fitment is not specified in the product data. Test-fit the assembly before ordering bulbs to confirm compatibility with your vehicle's current setup.

Is there a warranty on this headlight?

Warranty details are not included with this product listing. Contact our support team for coverage specifics and return process information.