Front Oxygen (A/F) Sensor: Installation

CAUTION: If lubricant is spill onto the exhaust pipe, wipe it off completely with cloth to avoid emission of smoke or causing a fire.

Before installing front oxygen (A/F) sensor, apply anti-seize compound only to the threaded portion of front oxygen (A/F) sensor to make the next removal easier.
CAUTION: Never apply anti-seize compound to the protector of front oxygen (A/F) sensor.

Anti-seize compound:

NEVER-SEEZ NSN, JET LUBE SS-30 or equivalent
Install the front oxygen (A/F) sensor.
Tightening torque:

30 N.m (3.1 kgf-m, 22.1 ft-lb)

Fig 1: Locating Front Oxygen Sensor
Courtesy of SUBARU OF AMERICA, INC.
Install the under cover. < Refer to INSTALLATION , Front Under Cover. >
Lower the vehicle.
Connect the connector of front oxygen (A/F) sensor.

Fig 2: Locating Front Oxygen (A/F) Sensor Connector
Courtesy of SUBARU OF AMERICA, INC.
Install the air intake duct (rear) and air cleaner case. < Refer to INSTALLATION , Air Cleaner Case. > < Refer to INSTALLATION , Air Intake Duct. >
Connect the battery ground terminal.

Fig 3: Disconnecting/Connecting Battery Ground Cable
Courtesy of SUBARU OF AMERICA, INC.
Install the collector cover.