How do you replace a fuel level sensor in an Nissan Armada?

To replace the fuel level sensor in a Nissan Armada, first, disconnect the negative battery terminal to ensure safety. Then, remove the fuel tank by draining it and unbolting it from its mounts. Access the fuel pump assembly where the sensor is located, typically under the rear seat or in the trunk, and disconnect the wiring harness and fuel lines. Replace the old sensor with the new one, reassemble everything, and reconnect the battery.