2018 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE

General Information & Specifications: Note: Note: Battery

When removing the battery terminal, always be sure to turn the ignition switch to OFF and disconnect the battery ground terminal first.

  • Ground terminal removal or installation (model without battery sensor)
    1. Disconnect the ground cable from battery.
      G10264576
      NOTE: If necessary, open the trunk before disconnecting the negative terminal of the battery.
    2. Connect the battery ground terminal.
      NOTE:
      • Clean the battery cable terminals and apply grease to retard the formation of corrosion.
      • Connect the positive (+) terminal, and then connect the negative (-) terminal of the battery.
      • Since DTCs may be detected, after the battery ground terminal is connected, wait for 10 seconds or more to turn the ignition switch to ON.
      • After the battery is installed, initial diagnosis of the electronic throttle control is performed. Wait for 10 seconds or more after turning the ignition switch to ON, and then start the engine.
      • For battery replacement procedures, refer to the "SC" procedure. Ref. to STARTING/CHARGING SYSTEMS(STI)>Battery>REMOVAL .

      Tightening torque:

      6.0 N.m (0.6 kgf-m, 4.4 ft-lb)

  • Ground terminal removal or installation (model with battery sensor)
    1. Disconnect the ground terminal from battery sensor.
      G10264577
      NOTE: If necessary, open the trunk before disconnecting the negative terminal or ground terminal of the battery.
    2. Install the ground terminal to the battery sensor.
      NOTE:
      • Install the battery sensor while holding it by hand to prevent rotating.
      • Clean the battery cable terminals and apply grease to retard the formation of corrosion.
      • Connect the positive (+) terminal, and then connect the negative (-) terminal of the battery.
      • Since DTCs may be detected, after the battery ground terminal is connected, wait for 10 seconds or more to turn the ignition switch to ON.
      • After the battery is installed, initial diagnosis of the electronic throttle control is performed. Wait for 10 seconds or more after turning the ignition switch to ON, and then start the engine.
      • For battery replacement procedures, refer to the "SC" procedure. Ref. to STARTING/CHARGING SYSTEMS (EXCEPT FOR STI)>Battery>REMOVAL .

      Tightening torque:

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

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.