2024 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE

LH Side

  1. Using a claw-foot wrench, install the knock sensor and connect the connector (A).
    NOTE:
    • Knock sensor must be positioned so that the connector center comes within the range shown in the figure.
    • Make sure that the knock sensor and its connector do not touch the adjacent parts.
    G16384136Courtesy of SUBARU OF AMERICA, INC.
    (a) Front of engine

    Tightening torque:Β 

    Calculation formula

    T = 24 N.m (2.4 kgf-m, 17.7 ft-lb) x L1/(L1 + L2)

    T: Reading of the torque wrench

    L1: Effective length of the torque wrench

    L2: Effective length of the crowfoot wrench

    NOTE: If the effective length of the tool used is unknown, consult the manufacturer of the tool.
    G11253181Courtesy of SUBARU OF AMERICA, INC.
    (a) Effective length of the crowfoot wrench (L2)
    (b) Effective length of the torque wrench (L1)
    (c) Center of the open end of crowfoot wrench
    (d) Center of drive square of the torque wrench
    (e) Center of the position where a force is applied by hand
    G13198300Courtesy of SUBARU OF AMERICA, INC.
  2. Install the connector (A) and clip (B).
    G13198270Courtesy of SUBARU OF AMERICA, INC.
  3. Install the clip (C), clip (D) and clip (E), and connect connector (A) and connector (B). (CVT model)
    G14601003Courtesy of SUBARU OF AMERICA, INC.
  4. Install the intercooler. Ref. to INTAKE (INDUCTION) (H4DOTC)>INTERCOOLER>INSTALLATION .
  5. Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
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.