For 1990-2009 cars

### Removal Procedure

1. Record the preset radio station.
2. Turn the ignition OFF.
3. Disconnect the negative battery cable.
4. Remove the knock sensor harness connector.
5. Remove the knock sensor from the retaining clip by inserting a flat-bladed screwdriver between the connector and the clip while sliding the connector upward.
6. Remove the knock sensor.

### Installation Procedure

Important: If a new knock sensor pigtail connector retaining clip is going to be used, the old one must be removed from the intake manifold. Use a push pin removal tool to remove the clip from the intake manifold.

1. Insert the knock sensor pigtail connector with the retaining clip into the intake manifold hole or slide the knock sensor pigtail connector over the retaining clip from the top.
2. Connect the knock sensor harness connector. Push in the connector until a click is heard, then pull back to confirm a positive engagement.

Notice: Refer to Fastener Notice in the Preface section.

Important: The larger metal contact area of the knock sensor MUST be towards the engine block. DTC P0325 may result if the sensor is installed backwards.

3. Install the knock sensor at the 9 o'clock position and the attachment bolt.

Tighten
Tighten the knock sensor-to-engine block bolt to 25 N·m (18 lb ft).

4. Connect the negative battery cable.

Tighten
Tighten the battery terminal bolts to 17 N·m (13 lb ft).

5. Reset the clock and preset radio stations.