Heater core replacement on Nissan Pathfinder?

Replacing the heater core on a Nissan Pathfinder typically involves several steps. First, you need to drain the coolant, remove the dashboard and any components obstructing access to the heater core. After detaching the heater hoses and securing the new core in place, reassemble everything in reverse order and refill the coolant. It's a labor-intensive process, often requiring several hours, so many choose to have it done by a professional.