How do you change knock sensor on 2004 Xterra?

To change the knock sensor on a 2004 Nissan Xterra, first disconnect the battery and remove the intake manifold for better access. Locate the knock sensor, which is typically positioned on the engine block, and disconnect the wiring harness. Unscrew the old sensor using a socket wrench, then install the new sensor, ensuring it's properly secured. Finally, reconnect the wiring harness, reassemble the intake manifold, and reconnect the battery.