Rear Oxygen Sensor: Installation

Before installing rear oxygen sensor, apply anti-seize compound only to threaded portion of rear 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 rear oxygen sensor.
Tightening torque: 21 N.m (2.1 kgf-m, 15.2 ft-lb)

Fig 1: Identifying Rear Oxygen Sensor
Courtesy of SUBARU OF AMERICA, INC.
Lower the vehicle.
Connect connector to rear oxygen sensor.

Fig 2: Connecting Connector To Rear Oxygen Sensor
Courtesy of SUBARU OF AMERICA, INC.
Connect battery ground cable.

Fig 3: Connecting Battery Ground Cable
Courtesy of SUBARU OF AMERICA, INC.