2017 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE

LH Side

  1. Install the knock sensor to the cylinder block.
    NOTE: The knock sensor should be installed so that the center of the connector is positioned at a 47.5 - 62.5Β° angle relative to the rear of engine.

    Tightening torque:Β 

    24 N.m (2.4 kgf-m, 17.7 ft-lb)Β 

    Fig 1: Knock Sensor Bolts Tightening Angle (LH Side)
    G11574627Courtesy of SUBARU OF AMERICA, INC.
  2. Connect the connector to the knock sensor.
    Fig 2: Locating Knock Sensor Connector (LH Side)
    G09479757Courtesy of SUBARU OF AMERICA, INC.
  3. Install the bolts securing the engine harness.

    Tightening torque:Β 

    19 N.m (1.9 kgf-m, 14.0 ft-lb)Β 

    Fig 3: Locating Engine Harness Bolt
    G10266205Courtesy of SUBARU OF AMERICA, INC.
  4. Install the throttle body. <Ref. to INSTALLATIONΒ , Throttle Body.>
  5. Install the intercooler. <Ref. to INSTALLATION , Intercooler.>
  6. Connect the ground terminal to battery sensor. <Ref. to BATTERY , NOTE, Note.>
  7. Install the collector cover. <Ref. to INSTALLATION , Collector Cover.>
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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