Hmm, well i wasnt looking on ebay, i was looking in town where i have a warranty against defect plus including cost of gaskets and coolant.... Ebay is good for certain things but i dont trust buying anything off of ebay that has to do with the runnability of my car.

But if anyone else is interested in how or whatever just want to look at it here is a site showing it on a 300zx which will work the same on a 240..
http://zhome.com/ZCMnL/PICS/detonati...ionSensor.html