Rear Oxygen Sensor: Installation

CAUTION: If lubricant is spilt over the exhaust pipe, wipe it off 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 With Mounting Nut
Courtesy of SUBARU OF AMERICA, INC.
Connect the connector to the rear oxygen sensor, and hold the rear oxygen sensor harness with clip (A).

Fig 2: Locating Rear Oxygen Sensor Connector
Courtesy of SUBARU OF AMERICA, INC.
Lower the vehicle.
Connect the ground cable to battery.

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