Will this work with my factory mirror housing?

Yes. This glass mounts directly to OE mirror housings at factory attachment points — no brackets or adapters needed. Just swap the old lens for the new one.

Do I need to remove the entire mirror assembly to install this?

Not necessarily. Most installs let you access the glass from inside the housing without pulling the mirror off the door. Check your specific housing design before starting.

Is the backing or tint already applied?

Backing and tint type are not specified — verify the condition of your replacement matches your factory lens before final install.