Does this mirror plug into my existing electrical harness?

Yes — this is a direct factory replacement that connects to your Miata's OEM mirror wiring. No rewiring required if you're swapping out an older powered unit. If upgrading from a manual mirror, you'll need to verify your door harness has the connector available.

Should I paint this before or after installation?

Paint before install. Easier to mask and hang the mirror on sawhorses, and you avoid overspray on your car. Let paint cure fully, then install. Use standard automotive primer and topcoat for best adhesion and match.

What hardware comes with this mirror?

The mirror assembly ships as a complete unit. Verify your door panel has the factory bolt holes (they're standard on powered mirror Miatas) before committing to installation — bring basic hand tools and a torque wrench to specification.