Knock sensors don't "go bad". They are a passive part.
The knock sensor is in the engine V under the intake manifolds and coolant crossover pipe. As it requires considerable disassembly and an expensive new gasket set to reach it, I suggest you make very sure there is something wrong with it first. You will have to remove the upper and lower intake manifolds and coolant crossover pipe assembly to reach it. Just because you are receiving a trouble code for it does not mean there is anything wrong with it. This sensor shares a circuit with other components that often will set a "ghost" trouble code.
There's no need to replace knock sensors, and there was never a 3.6 engine.
There is only one, in the engine "v" under the intake manifolds and coolant crossover tube.
the elictronic control sinsor at on a 93 mercury villager
can you tell me where the knock sensor is located on a 3.3l mercury villager
This is an image. (below)
It's in the center of the block. Engine disassembly needed. <><><><><> Not certain, but I thought knock sensors were mounted to the head or intake manifold in such a way that they could be replaced without major disassembly.
It is under the intake manifold.
1999 - 2002.
I payed $117.00 at auto zone
The knock sensor is under the intake manifold, which has to be removed. This should be left to an experienced mechanic.
There is no test procedure, since there is no way to duplicate engine detonation off the engine.
There are no symptoms. The knock sensor is a passive part that does not do anything if it's not activated. Knock sensors codes on the Villager/Quest are usually caused by some other component, not the sensor itself.