2024 Subaru BRZ Limited, Automatic TransFACTORY OEM SERVICE PROCEDURE

Rear Oxygen Sensor: Installation

CAUTION: If lubricant is spilt over the exhaust pipe, wipe it off with cloth to avoid emission of smoke or causing a fire.
  1. Install the rear oxygen sensor bracket together with the ground cord (A).

    Tightening torque: 

    T1: 7.5 N.m (0.8 kgf-m, 5.5 ft-lb)

    T2: 9.5 N.m (1.0 kgf-m, 7.0 ft-lb)

    Fig 1: Rear Oxygen Sensor Bracket Bolts With Torque Specification
    G16523372Courtesy of SUBARU OF AMERICA, INC.
  2. 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.

    Preparation items: 

    Anti-seize compound: NEVER-SEEZ NSN, JET LUBE SS-30 or equivalent

  3. Install the rear oxygen sensor and install the clip (A).

    Tightening torque: 

    21 N.m (2.1 kgf-m, 15.5 ft-lb)

    G16523370Courtesy of SUBARU OF AMERICA, INC.
  4. Install the under cover front side RH.
    G16523369Courtesy of SUBARU OF AMERICA, INC.
  5. Install the under cover front. Ref. to EXTERIOR/INTERIOR TRIM>FRONT UNDER COVER>INSTALLATION .
  6. Lower the vehicle.
  7. Install the clip, and connect the connector (A).
    G16523368Courtesy of SUBARU OF AMERICA, INC.
  8. Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
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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.