Knock Sensor location 2001 Forester

Hi , It's bolted to the top of the engine on the drivers side under the intake manifold. It just has one wire going to it as the body of the unit makes a connection to the engine. I was told it's just an accelerometer; it creates signal voltage in response to vibration. It's kind of hard to get at but I was able to gaet at it w/o removing the intake manifold. I found a picture of the part on line. That helped me locate it. Good luck.

-Nick