Rear Oxygen Sensor: Installation

CAUTION: If lubricant is spilt onto the exhaust pipe, wipe it off completely with cloth to avoid emission of smoke or causing a fire.

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, 15.5 ft-lb)

Fig 1: Locating Rear Oxygen Sensor
Courtesy of SUBARU OF AMERICA, INC.
Connect the connector to the rear oxygen sensor, and hold the rear oxygen sensor harness with the clip (A).

Fig 2: Locating Rear Oxygen Sensor Harness Mounting Clip
Courtesy of SUBARU OF AMERICA, INC.
Lower the vehicle.
Connect the battery ground terminal.

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