Some quick notes and pictures on how to replace the knock
sensor on a 1995 Subaru Legacy Outback (2.2 liter EJ22 engine).
Click images to enlarge.
The engine - not very clean!
New knock sensor.
Move the throttle body intake pipe out of the way.
Sensor location is on the driver's side rear close to the
throttle body. Arrow points to it.
Remove the sensor with an extension and 12mm socket.
Old sensor removed.
Install the new sensor. Torque the bolt to 16ft-lbs.
Clear the engine code (if present) using some sort of OBD scan-tool.
