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.
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HOMESERVICE MANUALSSUBARU1996LEGACY WAGON 4WD F4-2.2L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSOXYGEN SENSORSERVICE AND REPAIRREAR OXYGEN SENSOR
1996 Subaru Legacy Wagon 4WD F4-2.2L SOHC
Rear Oxygen Sensor
1996 Subaru Legacy Wagon 4WD F4-2.2L SOHCSECTION Rear Oxygen Sensor
REAR OXYGEN SENSOR
REMOVAL
1. Lift-up the vehicle.
2. Disconnect connector from rear oxygen sensor.
3. Apply Subaru CRC (Part No. 004301003) or its equivalent to threaded portion of rear oxygen sensor, and leave it for one minute or more.
4. Remove rear oxygen sensor.
CAUTION: When removing rear oxygen sensor, do not force rear oxygen sensor especially when exhaust pipe is cold, otherwise it will damage exhaust pipe.
INSTALLATION
1. Before installing rear oxygen sensor, apply anti-seize compound only to threaded portion of rear oxygen sensor to make the next removal easier.
CAUTION: Never apply anti-seize compound to protector of rear oxygen sensor.
2. Install rear oxygen sensor.
Tightening Torque: 21 ± 3 N.m (15.2 ± 2.2 ft-lb).
3. Connect connector of rear oxygen sensor.
4. Lower the vehicle.
REMOVAL
1. Lift-up the vehicle.
Except 96 And Newer California 2200cc Models:
96 And Newer 2200cc California Models Only:
2. Disconnect connector from rear oxygen sensor.
3. Apply Subaru CRC (Part No. 004301003) or its equivalent to threaded portion of rear oxygen sensor, and leave it for one minute or more.
Except 96 And Newer California 2200cc Models:
96 And Newer 2200cc California Models Only:
4. Remove rear oxygen sensor.
CAUTION: When removing rear oxygen sensor, do not force rear oxygen sensor especially when exhaust pipe is cold, otherwise it will damage exhaust pipe.
INSTALLATION
Except 96 And Newer California 2200cc Models:
96 And Newer 2200cc California Models Only:
1. Before installing rear oxygen sensor, apply anti-seize compound only to threaded portion of rear oxygen sensor to make the next removal easier.
CAUTION: Never apply anti-seize compound to protector of rear oxygen sensor.
Except 96 And Newer California 2200cc Models:
96 And Newer 2200cc California Models Only:
2. Install rear oxygen sensor.
Tightening Torque: 21 ± 3 N.m (15.2 ± 2.2 ft-lb).
3. Connect connector of rear oxygen sensor.
4. Lower the vehicle.
RENDER: 1.0x
NO RELATED
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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.