hi everyone i have a 2007 touareg v6 3.6 and i have a code for a knock sensor G66 showing up on code reader. i bought the part but i am not sure where it is located. i just changed both camshaft sensors myself if anyone needs to know how to do that it is very easy. are the knock sensors close to the camshaft sensors? this is what is happening with my touareg... very little power and its hard to reach highway speeds.also and this sounds major is when the engine is revved up i hear a loud bad sound coming from the engine and sounds like drivers side valve cover. even in park if it is revved to over 2000 rpm it makes a horrible clicking grinding from the motor. any help on this would be so helpful i have no vehicle because of this.