Front Oxygen (A/F) Sensor - Subaru IMPREZA GD 2007 Series Manual

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FUEL INJECTION (FUEL SYSTEMS)

16.Front Oxygen (A/F) Sensor

A: REMOVAL
1) Set the vehicle on a lift.
2) Disconnect the ground cable from the battery.
3) Disconnect the connector from front oxygen (A/
F) sensor.
4) Disconnect the engine harness fixed by clip (A)
from the bracket (B).
( A )
5) Remove the front right side wheel.
6) Lift up the vehicle.
7) Remove the service hole cover.
Front Oxygen (A/F) Sensor
FU-00009
FU-02995
( B )
FU-00078
FU-00783
FU(H4DOTC)-46
8) Apply spray-type lubricant or equivalent to the
threaded portion of front oxygen (A/F) sensor, and
leave it for one minute or more.
9) Remove the front oxygen (A/F) sensor.
CAUTION:
When removing the oxygen (A/F) sensor, wait
until exhaust pipe cools, otherwise it will dam-
age the exhaust pipe.
B: INSTALLATION
1) Before installing front oxygen (A/F) sensor, ap-
ply the anti-seize compound only to the threaded
portion of front oxygen (A/F) sensor. This facilitates
the next removal.
CAUTION:
Never apply anti-seize compound to the protec-
tor of front oxygen (A/F) sensor.
Anti-seize compound:
NEVER-SEEZ NSN, JET LUBE SS-30 or
equivalent
2) Install the front oxygen (A/F) sensor.
Tightening torque:
30 N·m (3.1 kgf-m, 22.1 ft-lb)
FU-00080
FU-00080