Subaru Legacy 2003 Service Manual page 968

15.Front Oxygen (A/F) Sensor
A: REMOVAL
1) Disconnect battery ground cable.
2) Disconnect connector from front oxygen (A/F)
sensor.
LH side
RH side
3) Lift-up the vehicle.
4) Remove under cover.
5) Separate harness from clip (A).
• LH side
( A )
FRONT OXYGEN (A/F) SENSOR
FU-00009
EX-00056
FU-00587
FU(H6DO)-43
FUEL INJECTION (FUEL SYSTEMS)
• RH side
6) Apply SUBARU CRC or its equivalent to thread-
ed portion of front oxygen (A/F) sensor, and leave it
for one minute or more.
SUBARU CRC (Part No. 004301003)
7) Remove front oxygen (A/F) sensor.
CAUTION:
When removing front oxygen (A/F) sensor, do
not force front oxygen (A/F) sensor especially
when exhaust pipe is cold, otherwise it will
damage exhaust pipe.
( A )
FU-00588
FU-00589
FU-00590