Subaru Legacy 2003 Service Manual page 970

16.Rear Oxygen Sensor
A: REMOVAL
1) Disconnect battery ground cable.
2) Lift-up the vehicle.
3) Disconnect connector from rear oxygen sensor.
4) Apply SUBARU CRC or its equivalent to thread-
ed portion of rear oxygen sensor, and leave it for
one minute or more.
SUBARU CRC (Part No. 004301003)
5) Remove rear oxygen sensor.
CAUTION:
When removing, do not force rear oxygen sen-
sor in an unnatural way especially when ex-
haust pipe is cold, otherwise it will damage
exhaust pipe.
REAR OXYGEN SENSOR
B: INSTALLATION
1) Before installing rear oxygen sensor, apply anti-
seize compound only to threaded portion of rear
oxygen sensor to make the next removal easier.
CAUTION:
Never apply anti-seize compound to protector
of rear oxygen sensor.
Anti-seize compound:
2) Install rear oxygen sensor.
Tightening torque:
FU-00535
3) Connect connector to rear oxygen sensor.
EX-00058
4) Lower the vehicle.
5) Connect battery ground cable.
FU-00591
FU(H6DO)-45
FUEL INJECTION (FUEL SYSTEMS)
SS-30 by JET LUBE
21 N·m (2.1 kgf-m, 15.2 ft-lb)
FU-00591
EX-00058
FU-00535