Do these lights require bulbs or wiring harness adapters?

The lights themselves ship as units only. You'll reuse your factory bulbs and wiring — no adapters needed if you're swapping direct bolt-in.

Can I install these without removing the bumper?

Access depends on your bumper design and how tight the engine bay sits. Most installs go faster with the bumper off, but test-fit first to confirm clearance on your specific setup.

What's the return window if they don't fit?

Check the shop return policy for your region — it's listed at checkout. Since these are brand new OEM-style units, inspect them immediately upon arrival and report any damage or defects within the stated window.