O.E.M. KS36 Knock Detonation Sensor Knock Sensors are same form, fit, function as OE and generate same as O.E.M. waveforms to prevent engine damage due to detonation or poor fuel quality. Correct thread type and pitch ensure units will not loosen during operation causing lack of signal to PCM during critical moments. Tin-plated and solid Brass terminals ensure excellent conductivity.