Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Impreza 2001-2002.2004-2007 Approved Subaru Impreza 2004 WRX STi 02. ENGINE SECTION (STi) 01. FUEL INJECTION (FUEL SYSTEMS) 14. Front Oxygen (A-F) Sensor

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                                 FRONT OXYGEN (A/F) SENSOR
                                                                          FUEL INJECTION (FUEL SYSTEMS)

14.Front Oxygen (A/F) Sensor                              7) Apply SUBARU CRC or its equivalent to the
                                                          threaded portion of front oxygen (A/F) sensor, and
A: REMOVAL                                                leave it for one minute or more.
1) Disconnect the ground cable from battery.
                                                          SUBARU CRC (Part No. 004301003)
                                                          8) 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 exhaust pipe.




                                        FU-00009

2) Disconnect the connector from the front oxygen
(A/F) sensor.



                                                                                                FU-00080




                                        FU-00369

3) Disconnect the engine harness fixed by clip (A)
from the bracket (B).




                           (B)



                 (A)
                                        FU-00078

4) Remove the front right side wheel.
5) Lift-up the vehicle.
6) Remove the service hole cover.




                                        FU-00783



                                                   FU(STi)-37
                                     FRONT OXYGEN (A/F) SENSOR
FUEL INJECTION (FUEL SYSTEMS)

B: INSTALLATION                                            7) Connect the connector of front oxygen (A/F)
1) Before installing front oxygen (A/F) sensor, ap-        sensor.
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:
  SS-30 by JET LUBE
CAUTION:
Never apply anti-seize compound to protector
of front oxygen (A/F) sensor.
2) Install the front oxygen (A/F) sensor.
                                                                                                  FU-00369
Tightening torque:
  30 N

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