For 1990-2009 cars

### Removal Procedure

1. Raise and support the vehicle only high enough to access the number 2 knock sensor (KS) through the wheelhouse. Refer to Lifting and Jacking the Vehicle.
2. Remove the left wheelhouse liner. Refer to Front Wheelhouse Liner Replacement.
3. Disconnect the engine wiring harness electrical connector (3) from the KS (1).
4. Remove the KS retaining bolt.
5. Remove the KS (1) from the engine block.

### Installation Procedure

Caution: Refer to Fastener Caution in the Preface section.

1. Install the KS (1) and the retaining bolt to the engine block, positioning the electrical terminals rearward.

Tighten the KS bolt to 25 N·m (18 lb ft).

2. Connect the engine wiring harness electrical connector (3) to the KS (1).
3. Install the left wheelhouse liner. Refer to Front Wheelhouse Liner Replacement.
4. Lower the vehicle.