Does this mirror need any wiring or does it plug into the factory harness?

Designed for factory mounting points — verify your vehicle has the power mirror wiring already run. If your Elantra originally came with manual mirrors, you'll need to source the dedicated power harness from a donor vehicle or OEM supplier.

What condition is this mirror in?

This is an OEM assembly. Confirm with the listing details whether it ships in new, refurbished, or used condition before purchase.

Can I install this myself, or do I need a dealer?

Mirror swap is straightforward — remove three bolts and disconnect the power plug from the door panel. Reverse to install. Basic hand tools only. You'll want the door panel removed to safely route the harness, but no special equipment required.