How do you replace rear oxygen sensors in a 2001 Infiniti qx4?

To replace the rear oxygen sensors in a 2001 Infiniti QX4, first, ensure the vehicle is turned off and cooled down. Raise the vehicle with jack stands and locate the rear oxygen sensors on the exhaust pipes. Disconnect the electrical connectors and use a wrench or oxygen sensor socket to unscrew the old sensors. Install the new sensors by threading them in place, reconnecting the electrical connectors, and ensuring everything is secure before lowering the vehicle.