2017 Subaru Outback 2.5iFACTORY OEM SERVICE PROCEDURE

Knock Sensor: Installation

  1. Install the knock sensor to the cylinder block, and connect the connector to the knock sensor.
    NOTE:
    • Install the knock sensor connector so that the center of the connector is aligned with the extension line from the cylinder block rib (a).
    • Make sure that the knock sensor and its connector do not touch the adjacent parts.

    Tightening torque:Β 

    25 N.m (2.5 kgf-m, 18.4 ft-lb)Β 

    Fig 1: Locating Knock Sensor Bolt
    G11565968Courtesy of SUBARU OF AMERICA, INC.
  2. Install the bolt securing the connector to the A/C compressor.

    Tightening torque:Β 

    6.4 N.m (0.7 kgf-m, 4.7 ft-lb)Β 

  3. Connect the ground terminal to battery sensor. Ref. to 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.

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