SOURCE: nissan xterra knock sensor
It's the valley of the engine underneath the intake manifold. It's about an $800 job because the top of the engine has to come off. However, unless you have a supercharged xterra it shouldn't effect performance. Also, the knock sensor will not trip the check engine light, as it does not indicate a primary problem, so if your light is on you should have another code that should be fixed first.
SOURCE: Camshaft sensor - where is it?
There are two cam sensors and they are located on the back of each head in line with the intake cams.
SOURCE: Diagram available for 01 Nissan Xterra Knock Sensor location?
V6 3.3L The sensor is located underneath the air intake manifold on top
of the engine block. This should take an experienced mechanic about 3-4
hours to replace.
Fig. Engine compartment component locations
Hope this help (remember rated this free help) Good luck.
SOURCE: how to replace a knock sensor on a 2002 nissan
Unplug the electrical plug/connector from the base of sensor. You will have to take out bolt from the head of the sensor that threads into the cylinder head. Thats really it. Unplug - Unscrew - replace!
SOURCE: knock sensor 2000 nissan xterra V6, location of
Hello the sensor is located under your intake manifold you will need to remove the intake manifold to gain access to it here is photos of what and where your looking for this
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