Any pics of where it is, or an idiots
guide to it (i.e. it's the pink thing on the left hand side of the largest wheel your belt runs over)??
Edit : 'Knock Sensor' in the haynes manual says when replaced, it's performance may be affected if the mounting bolt isn't torqued correctly. I read the Knock Sensor is the same as the CPS - if this is true is the manual correct? What torque should it be tightened to as I don't fancy changing it only to break it again!