Will this glass fit my factory mirror housing without modification?

Yes—this is cut to match OEM mirror geometry. It seats directly into the existing housing and uses factory mounting points with no drilling or frame work needed.

Do I need new fasteners to install this, or does it come with hardware?

The glass lens assembly is included. You'll want to have the fasteners ready from your original mirror or source standard hardware to match your factory setup—check your service manual for specs if yours are missing.

Is there a protective coating on the glass, or should I treat it before install?

The glass arrives ready to install as-is. No additional prep or coating application is required before mounting into your mirror housing.