Just replaced my knock sensor for 96 ls400 for error code p0330. The sensor was the passenger side one and i found a new one on ebay for $70. I looked down the driver side of the intake manifold and the sensors are right there. I got the sensor out without removing any engine parts and it took about ten minutes to get out and same to replace. i did have to use a pair of laparoscopic graspers and a flexible ratcheting tbar from harbor freight. You also need a 1 1/16 socket.