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

Mounting method not specified in the product data. Test-fit your mirror housing to confirm whether the glass seats and locks into the existing frame without disassembly, or if the mirror cap needs to come off first. Your owner's manual will show the quickest path.

Is this glass heated, or does it have any special coating?

This is a hard panel glass lens with factory-style construction. If your original mirror included heating elements or a special tint, confirm that your mirror housing supports those features before ordering.

What if the glass doesn't fit or seals properly?

Return process details aren't confirmed here—reach out to ModSupply customer service with photos of the housing and glass fit, and they'll handle the next step. Most fitment issues can be resolved with a straightforward swap or credit.