Do I need to remove the factory markers to install these?

Yes—the factory amber markers come out first. They typically unclip from behind the fender, and then you wire in the new assembly. It's a straightforward swap.

Will these work with my existing wiring harness?

The sockets are included, so if your factory harness is intact, they should mate up. If your car is heavily modified or the original wiring is damaged, you may need to source a compatible harness or splice.

What if one of the bulbs burns out after I install them?

Replacement bulbs are cheap and widely available. You'll be able to swap a burned-out bulb the same way you would on any OEM marker light—pull the assembly slightly and twist out the socket.