Subaru Impreza 2003 Service Manual page 924

FUEL INJECTION (FUEL SYSTEMS)
18.Rear Oxygen Sensor
A: REMOVAL
1) Disconnect the ground cable from battery.
2) Lift-up the vehicle.
3) Disconnect the connector from rear oxygen sen-
sor.
4) Remove the clip by pulling it out from the upper
side of crossmember.
5) Apply SUBARU CRC or its equivalent to the
threaded portion of rear oxygen sensor, and leave
it for 1 minute or more.
SUBARU CRC (Part No. 004301003)
REAR OXYGEN SENSOR
6) Remove the rear oxygen sensor.
CAUTION:
When removing the oxygen sensor, wait until
the exhaust pipe cools, otherwise it will dam-
age the exhaust pipe.
FU-00009
B: INSTALLATION
1) Before installing the rear oxygen sensor, apply
anti-seize compound only to the threaded portion of
rear oxygen sensor to make next removal easier.
CAUTION:
Never apply anti-seize compound to the protec-
tor of rear oxygen sensor.
Anti-seize compound:
SS-30 by JET LUBE
2) Install the rear oxygen sensor.
Tightening torque:
FU-00081
21 N·m (2.1 kgf-m, 15.2 ft-lb)
3) Connect the connector to rear oxygen sensor.
FU-00082
FU(H4DOTC)-46
FU-00371
FU-00371
FU-00081