i HAVE A 96 MAXIMA. hOW DO YO REPLACE THE KNOCK SENSOR?

Answer 1

Instructions, with some pictures, on how to replace the Knock Sensor can be found here:

http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/1f/4f/b5/0900823d801f4fb5.jsp

Answer 2

Disconnect the wire at the connector, and then unthread it out of the block. Pretty simple, just make sure you use a box end wrench to remove it because it is likely frozen in place and needs some serious elbow grease to get moving.