2015 Subaru WRX STI Launch EditionFACTORY OEM SERVICE PROCEDURE

Knock Sensor: Installation

  1. Install the knock sensor to the cylinder block.
    NOTE: The portion of the knock sensor cord that is pulled out must be positioned at a 60Β° angle relative to the engine rear.

    Tightening torque:Β 

    24 N.m (2.4 kgf-m, 17.7 ft-lb)Β 

    Fig 1: Locating Cylinder Block Knock Sensor (Vehicle Front Side)
    G10264824Courtesy of SUBARU OF AMERICA, INC.
  2. Install the secondary air combination valve RH. <Ref. to SECONDARY AIR COMBINATION VALVE RH , INSTALLATION, Secondary Air Combination Valve.>
  3. Install the intake manifold. <Ref. to INSTALLATIONΒ , Intake Manifold.>
  4. Install the intercooler. <Ref. to INSTALLATION , Intercooler.>
  5. Connect the battery ground terminal.
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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