Will this bolt straight onto my Liberty without modification?

Yes. This is OEM spec for your model year, so it mounts at factory points using the original bracket configuration. No drilling or adapter plates needed.

Does the heating element work independently from power adjustment?

Both functions run through the same electrical harness. Turn on your defrost or use the cabin heater controls—the mirror heat follows the vehicle's climate system logic.

What if the glass is cracked or the motor fails after I install it?

Test the assembly before final installation. Once mounted, mirror repairs typically fall under your vehicle's warranty terms, not the part itself. Keep your receipt for reference.