LH Side

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

Anti-seize compound:

SS-30 by JET LUBE
Install front oxygen sensor.
Tightening torque:

21 N.m (2.1 kgf-m, 15.2 ft-lb)

Fig 1: Installing Front Oxygen Sensor
Courtesy of SUBARU OF AMERICA, INC.
Install front oxygen sensor harness to bracket.

Fig 2: Installing Front Oxygen Sensor Harness To Bracket
Courtesy of SUBARU OF AMERICA, INC.
Lower the vehicle.
Connect connector to front oxygen sensor.

Fig 3: Connecting Connector To Front Oxygen Sensor
Courtesy of SUBARU OF AMERICA, INC.
Connect battery ground cable.

Fig 4: Connecting Battery Ground Cable
Courtesy of SUBARU OF AMERICA, INC.