Do I need any adhesive or fasteners to install this?

The mounting method isn't specified in the product data — test-fit the lens into your mirror housing first to confirm how it seats, then decide between adhesive or mechanical fasteners based on your setup.

Can I install this myself without removing the entire mirror assembly?

Depends on your mirror design. Some Camry mirrors allow glass-only replacement from the back; others require full housing removal. Check your vehicle's service manual or test-fit before committing to either approach.

Will this fit if my current mirror glass is cracked or fogged?

As long as the mirror housing itself is intact and your car's model year falls within the 02-06 range, this lens should swap in. Confirm the right side before ordering — left and right are not interchangeable.