2004 Subaru Forester X, AutomaticFACTORY OEM SERVICE PROCEDURE

RH Side

  1. Disconnect the ground cable from battery.
    Fig 1: Disconnecting Ground Cable From Battery (RH Side)
    G00994967Courtesy of SUBARU OF AMERICA, INC.
  2. Remove the resonator chamber. Refer to REMOVAL , Resonator Chamber.
  3. Remove the spark plug cords by pulling boot, not the cord itself.
    Fig 2: Removing Spark Plug Cords By Pulling Boot
    G00994968Courtesy of SUBARU OF AMERICA, INC.
  4. Remove the spark plugs with spark plug sockets.
    Fig 3: Removing Spark Plugs With Spark Plug Sockets
    G00994969Courtesy of SUBARU OF AMERICA, INC.
Chapter Navigation
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

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.