Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2011 Subaru Outback LimitedFACTORY OEM SERVICE PROCEDURE
Rear Oxygen Sensor: Installation
CAUTION:
If lubricant is spilt onto the exhaust pipe, wipe it off completely 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)
- Install the under cover. Refer to FRONT UNDER COVER .
- Lower the vehicle.
- Connect the rear oxygen sensor connector, and hold the rear oxygen sensor harness with the clip.
- Install the air intake duct. Refer to AIR INTAKE DUCT .
- Connect the battery ground terminal.
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.