1. Disconnect the negative battery cable.
2. Lift up the vehicle.
3. Remove the front wheel (LH). (See WHEEL AND TIRE REMOVAL/INSTALLATION.)
4. Remove the splash shield.
5. Disconnect the OSS sensor connector.
6. Remove the bolt.
7. Remove the OSS sensor.
8. Inspect the OSS sensor hole.
9. Inspect the O-ring for cuts or cracks. Install a new O-ring if necessary.
