Will this bolt directly into my Civic without modifying the door panel?

Yes — this mirror is built on factory mounting points, so installation uses the same attachment locations as your original mirror. No drilling or panel modification needed.

What prep is needed before I paint this?

The mirror arrives in primer-ready condition. Light sanding to ensure adhesion and a clean wipe-down is all you need before applying your base coat and clear.

Does this come with the wiring harness already connected?

The mirror assembly includes the electrical connector — you'll plug it into your door harness the same way your OEM mirror did. No rewiring required.