Will this need a bulb, or does it come with one?

The assembly ships without a bulb installed. You'll need to source a halogen bulb that matches your original fitment — your existing bulb should transfer over, or grab the same spec from any parts store.

Do I need to reprogram or aim this after installation?

Bolt it in and you're done. Since it uses your factory mounting points and matches OEM geometry, no aiming or electronic setup is required — it'll work exactly like your original unit.

What's the return process if this doesn't fit?

Test-fit before full installation. If there's a fitment issue, document it with photos and contact ModSupply directly — they'll walk you through next steps from there.