Do I need to buy both left and right headlights, or can I replace just the driver side?

You can replace just the left side if that's the one that's damaged or burned out. Matching the right side later is up to you — many drivers prefer to keep them in sync for appearance, but there's no requirement to buy them as a set.

Will this bolt directly onto my vehicle without any modifications?

Yes. This assembly mounts at the factory headlight points — no drilling, cutting, or brackets needed. Unbox it and bolt it in place using your existing hardware.

Does this headlight come with a bulb installed?

The assembly itself comes ready to install. Confirm bulb inclusion with your specific order — bulbs are sometimes sold separately depending on configuration.