Rear Oxygen Sensor - Subaru Legacy 2003 Service Manual

15.Rear Oxygen Sensor

A: REMOVAL
1) Disconnect the ground cable from battery.
2) Lift-up the vehicle.
3) Disconnect the connector from the rear oxygen
sensor.
4) Apply SUBARU CRC or its equivalent to the
threaded portion of rear oxygen sensor, and leave
it for one minute or more.
SUBARU CRC (Part No. 004301003)
5) Remove the rear oxygen sensor.
CAUTION:
When removing the oxygen sensor, wait until
exhaust pipe cools, otherwise it will damage ex-
haust pipe.
REAR OXYGEN SENSOR
B: INSTALLATION
1) Before installing rear oxygen sensor, apply the
anti-seize compound only to the threaded portion of
rear oxygen sensor to make the next removal eas-
ier.
CAUTION:
Never apply anti-seize compound to protector
of rear oxygen sensor.
Anti-seize compound:
FU-00009
2) Install the rear oxygen sensor.
Tightening torque:
EX-00030
3) Connect the connector to the rear oxygen sen-
sor.
FU-00198
4) Lower the vehicle.
FU(H4SO)-43
FUEL INJECTION (FUEL SYSTEMS)
SS-30 by JET LUBE
21 N·m (2.1 kgf-m, 15.2 ft-lb)
FU-00199
FU-00198
EX-00030