Will this need new bulbs, or does it use my existing ones?

Bulbs are not included — you'll need to source H11 or equivalent depending on your vehicle's original spec. Check your owner's manual or test-fit before ordering to confirm the exact bulb type your model uses.

Do I need to wire up the amber marker, or is it already connected?

The amber side marker is built into the assembly but you'll need to verify it connects to your existing turn signal harness. Some vehicles have factory connectors ready; others may require a splitter or tap. Inspect the back of the assembly and your vehicle's connector before installation.

What if the headlight doesn't align perfectly after install?

Factory mounting points should seat these correctly, but aim adjustment screws are typically located on the back of the housing. You may need to access them from inside the engine bay after install — refer to your service manual for the correct vertical and horizontal alignment specs.