Impreza WRX F4-2.0L DOHC Turbo (2004)
7. Remove the service hole cover.
8. Apply SUBARU CRC or its equivalent to the threaded portion of front oxygen (A/F) sensor, and leave it for one minute or more.
SUBARU CRC (Part No. 004301003)
9. Remove the front oxygen (A/F) sensor.
CAUTION: When removing the oxygen (A/F) sensor, wait until exhaust pipe cools, otherwise it will damage exhaust pipe.
INSTALLATION
1. Before installing front oxygen (A/F) sensor, apply the anti-seize compound only to the threaded portion of front oxygen (A/F) sensor to make the
next removal easier.
Anti-seize compound:
SS-30 by JET LUBE
CAUTION: Never apply anti-seize compound to protector of front oxygen (A/F) sensor.
2. Install the front oxygen (A/F) sensor.
Tightening torque: 21 N.m (2.1 kgf-m, 15.2 ft-lb)
