Rear Oxygen Sensor: Installation

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

Anti-seize compound

NEVER-SEEZ NSN, JET LUBE SS-30 or equivalent
Install the rear oxygen sensor.
Tightening torque:

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

Fig 1: Identifying Front Oxygen (A/F) Sensor And Rear Oxygen Sensor
Courtesy of SUBARU OF AMERICA, INC.
Install the under cover.
Lower the vehicle.
Connect the connector to rear oxygen sensor and mount the harness to the securing bracket.
NOTE: Install the harness clip to the securing bracket.

Fig 2: Identifying Front Oxygen (A/F) Sensor Connector And Rear Oxygen Sensor Connector
Courtesy of SUBARU OF AMERICA, INC.
Connect the ground cable to the battery.

Fig 3: Connecting Battery Ground Cable

Courtesy of SUBARU OF AMERICA, INC.