knock sensor
 

hi guys, could anyone tell me where on the engine is the knock sensor???

also, does anyone know how much one of these suckers cost?

I'm doing this from memory so I might be a little off, but it's above the plugs on the rotor housing, the front rotor housing I think. You'll notice that on the other rotor housing, there's a tapped hole with nothing in it; the coorisponding hole on the other housing is a hex-head bolt, which is the knock sensor.

Hope it helps...