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Front Oxygen (A/F) Sensor: Removal

WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the collector cover.
  2. Disconnect the ground cable from battery.
    Fig 1: Disconnecting Ground Cable From Battery
    G07670495Courtesy of SUBARU OF AMERICA, INC.
  3. Remove the air intake duct (rear) and air cleaner case. < Ref. to REMOVAL , Air Intake Duct. > < Ref. to REMOVAL , Air Cleaner Case. >
  4. Disconnect the connectors from front oxygen (A/F) sensor.
    Fig 2: Locating Front Oxygen (A/F) Sensor Connectors
    G07670496Courtesy of SUBARU OF AMERICA, INC.
  5. Lift up the vehicle.
  6. Remove the under cover. < Ref. to REMOVAL , Front Under Cover. >
  7. Apply spray-type lubricant to the threaded portion of front oxygen (A/F) sensor, and leave it for one minute or more.
  8. Remove the front oxygen (A/F) sensor.
    CAUTION: When removing the front oxygen (A/F) sensor, wait until exhaust pipe cools, otherwise it will damage the exhaust pipe.
    Fig 3: Locating Front Oxygen (A/F) Sensor
    G07670497Courtesy of SUBARU OF AMERICA, INC.
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