LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2019 >> Ascent Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System >> Rear Oxygen Sensor >> Installation
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Rear Oxygen Sensor: Installation

CAUTION: If lubricant is split over the exhaust pipe, wipe it off with cloth to avoid emission of smoke or causing a fire.
  1. 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

  2. Install the rear oxygen sensor and connect the connector.
    CAUTION: Do not cross the rear oxygen sensor harness with the ground cord during installation.

    Tightening torque: 

    30 N.m (3.1 kgf-m, 22.1 ft-lb)

  3. Install the mud guard front LH. Ref. to EXTERIOR/INTERIOR TRIM>MUD GUARD>INSTALLATION .
  4. Install the under cover front. Ref. to EXTERIOR/INTERIOR TRIM>FRONT UNDER COVER>INSTALLATION .
  5. Lower the vehicle.
  6. Connect the battery ground terminal. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
scientia non olet · About LEMON Manuals