Front Oxygen (A/F) Sensor: Installation

Before installing front oxygen (A/F) sensor, apply the anti-seize compound only to the threaded portion of front oxygen (A/F) sensor to make the next removal easier.
Anti-seize compound:
1. SS-30 by JET LUBE
CAUTION: Never apply anti-seize compound to protector of front oxygen (A/F) sensor.

Fig 1: Applying Anti-Seize Compound To Oxygen Sensor
Courtesy of SUBARU OF AMERICA, INC.
Install the front oxygen (A/F) sensor.
Tightening torque:
1. 21 N.m (2.1 kgf-m, 15.2 ft-lb)
Fig 2: Installing Oxygen Sensor
Courtesy of SUBARU OF AMERICA, INC.
Lower the vehicle.
Connect the connector to front oxygen (A/F) sensor, and then connect the connector to engine hanger.

Fig 3: Identifying Connector For Connecting To Engine Hanger
Courtesy of SUBARU OF AMERICA, INC.
Connect the battery ground cable to battery.

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