Will this mount straight to my Sienna without modification?

Yes. This mirror uses factory attachment points — no drilling, no fabrication. Line up the mount and secure with OEM fasteners.

What do I need to do before painting?

Clean the black finish and sand lightly to help paint adhesion. Mask off the mirror glass and backing, then prime and paint to your color. Follow your paint product's cure time before reinstalling.

Are any fasteners or hardware included?

The mirror assembly ships alone. You'll use your existing OEM mounting hardware or replace with new fasteners from your local supplier if needed.