Oxygen sensor (FA20): Removal

Disconnection of the battery ground terminal (Refer to Working precautions and notes )
Removal of front tire RH
Removal of under cover front AL (Refer to Removal )
Disconnection of under cover front side RH
1. Remove 3 clips, and disconnect the under cover front side RH.
Fig 1: Removing Under Cover Clips (Front Side RH)
Courtesy of SUBARU OF AMERICA, INC.
Removal of oxygen sensor
1. Disconnect the connector for oxygen sensor and the 2 clamps.
  
  Fig 2: Locating Oxygen Sensor Connector And Clamps
  Courtesy of SUBARU OF AMERICA, INC.
2. Remove the oxygen sensor from the exhaust manifold.
Fig 3: Locating Oxygen Sensor And Exhaust Manifold
Courtesy of SUBARU OF AMERICA, INC.