Will this plug straight into my car, or do I need custom wiring?

This is a factory OEM part — it connects to your existing mirror harness without modification. Test-fit the connector at your door before final installation to confirm alignment with your wiring.

Does the heated glass work independently, or is it tied to the defroster?

Heating functionality and control method are not detailed in the product specs. Check your vehicle's manual or contact dealer service to confirm how heated mirrors are switched on your model year.

What condition is this mirror in, and does it come with any warranty?

This is an OEM takeoff part — removed from a working vehicle and resold. No warranty or return window is specified; review ModSupply's return policy before purchase.