Front Oxygen (A/F) Sensor - Subaru Legacy 2004 Service Manual

FUEL INJECTION (FUEL SYSTEMS)

13.Front Oxygen (A/F) Sensor

A: REMOVAL
1) Disconnect the ground cable from battery.
2) Remove the air intake duct. <Ref. to IN(H4SO
2.0)-9, REMOVAL, Air Intake Duct.>
3) Remove the connector of front oxygen (A/F)
sensor.
4) Remove the clip holding harness.
5) Lift-up the vehicle.
6) Remove the under cover.
7) Apply spray-type lubricant to the threaded por-
tion of front oxygen (A/F) sensor, and leave it for
one minute or more.
8) Remove the front oxygen (A/F) sensor.
CAUTION:
When removing the front oxygen (A/F) sensor,
wait until exhaust pipe cools, otherwise it will
damage the exhaust pipe.
Front Oxygen (A/F) Sensor
B: INSTALLATION
1) Before installing front oxygen (A/F) sensor, ap-
ply anti-seize compound only to the threaded por-
tion of front oxygen (A/F) sensor to make the next
removal easier.
Anti-seize compound:
CAUTION:
Never apply anti-seize compound to the protec-
tor of front oxygen (A/F) sensor.
2) Install the front oxygen (A/F) sensor.
Tightening torque:
IN-00203
3) Install the under cover.
4) Lower the vehicle.
5) Hold the harness with clip.
ME-00859
6) Connect the connector of front oxygen (A/F)
sensor.
7) Install the air intake duct. <Ref. to IN(H4SO 2.0)-
9, INSTALLATION, Air Intake Duct.>
8) Connect the battery ground cable to battery.
FU-01114
FU(H4SO 2.0)-32
SS-30 JET LUBE
!
21 N m (2.1 kgf-m, 15.2 ft-lb)
FU-01114
ME-00859
IN-00203