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.
Anti-seize compound:

NEVER-SEEZ NSN, JET LUBE SS-30 or equivalent

CAUTION: Never apply anti-seize compound to the protector of rear oxygen sensor.
Install the rear oxygen sensor.
Tightening torque:

21 N.m (2.1 kgf-m, 15.5 ft-lb)
- LH side
  
  Fig 1: Locating Rear Oxygen Sensor (LH)
  Courtesy of SUBARU OF AMERICA, INC.
- RH side
  
  Fig 2: Locating Rear Oxygen Sensor (RH)
  Courtesy of SUBARU OF AMERICA, INC.
Hold the harness with clip.
Connect the connector to rear oxygen sensor.
- LH side
  
  Fig 3: Locating Rear Oxygen Sensor Connector (LH)
  Courtesy of SUBARU OF AMERICA, INC.
- RH side
  
  Fig 4: Locating Rear Oxygen Sensor Connector (RH)
  Courtesy of SUBARU OF AMERICA, INC.
Lower the vehicle.
Connect the battery ground cable to the battery.