Bosch Knock Sensor

This sensor is used for detecting structural  vibrations in spark ignition engines due to uncontrolled combustion. .

The main benefits of this sensor are its robust mechanical design, compact housing and precise determination of structure-related noise. The small packaging is accomplished by integrating the connector directly to the sensor.

Sensor pinout:
Pin 1 Sig+
Pin 2 Sig-

Mating connector available here