How do you replace heater core in a Nissan quest?

To replace the heater core in a Nissan Quest, first, disconnect the battery and drain the coolant. Remove the dashboard and access the heater core housing, typically located near the firewall. Disconnect the hoses and electrical connectors, then remove the old heater core and install the new one, ensuring all connections are secure. Reassemble the dashboard, refill the coolant, and check for leaks.