Do I need to remove the entire mirror assembly to swap the glass?

No. This lens slides into your factory mirror housing from the front. You don't have to unbolt anything from the door—just pop out the old glass and press the new one in place.

Is this tempered or treated glass?

It's hard panel construction. Handles road debris the same way your original mirror did. Avoid direct impact or extreme thermal shock.

Does this come with adhesive or fasteners?

Glass seats into the factory housing with the existing clip system. No additional hardware needed—your mirror frame holds it in place.