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. This facilitates the next removal.
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: Identifying Front Oxygen Sensor
Courtesy of SUBARU OF AMERICA, INC.
Install the service hole cover.

Fig 2: Identifying Service Hole Cover
Courtesy of SUBARU OF AMERICA, INC.
Lower the vehicle.
Install the front right side wheel.
Tightening torque:

120 N.m (12.2 kgf-m, 88.5 ft-lb)
Connect the engine harness to the bracket using a clip.
Connect the connector of front oxygen (A/F) sensor.

Fig 3: Identifying Front Oxygen (A/F) Sensor Connector
Courtesy of SUBARU OF AMERICA, INC.
Connect the battery ground cable to the battery.

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