NTK Cam Sensor – CMN3-A028. NGK Spark Plugs is one of the leading automotive and technical ceramics suppliers globally.The automotive side of the company specialises in the fields of ignition and sensor technology, supplying Original Equipment customers across the globe. The NTK Vehicle Electronics brand offers an extensive range of engine management sensors across a wide range of categories. Precision-wound, coated-copper windings to increase longevity.