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Front Oxygen (A/F) Sensor: Removal

WARNING: This page is about a different car, the 2013 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/Connecting Battery Ground Cable
    G06336085Courtesy of SUBARU OF AMERICA, INC.
  3. Remove the air intake duct (rear) and air cleaner case. < Refer to REMOVAL , Air Intake Duct. > < Refer to REMOVAL , Air Cleaner Case. >
  4. Disconnect the connectors from front oxygen (A/F) sensor.
    Fig 2: Locating Front Oxygen (A/F) Sensor Connector
    G08539915Courtesy of SUBARU OF AMERICA, INC.
  5. Lift up the vehicle.
  6. Remove the under cover. < Refer 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 With Mounting Nut
G08539916Courtesy of SUBARU OF AMERICA, INC.
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