Original Engine Management KS18 Knock 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. Heavy-duty plated steel & thermoplastic construction Precison-engineered circuit for faster response time