Rear Oxygen Sensor: Installation

CAUTION: If lubricant is split onto 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: Identifying Rear Oxygen Sensor
Courtesy of SUBARU OF AMERICA, INC.
Affix the rear oxygen sensor with the clip (A). (AT model)
Connect the connector to rear oxygen sensor.
- AT model
  
  Fig 2: Identifying Rear Oxygen Sensor And Clip (AT Model)
  Courtesy of SUBARU OF AMERICA, INC.
- MT model
  
  Fig 3: Identifying Rear Oxygen Sensor And Clip (MT Model)
  Courtesy of SUBARU OF AMERICA, INC.
Lower the vehicle.
Connect the ground cable to battery.

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