Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
Operating Cylinder: Removal
CAUTION:
Brake fluid spilled on the vehicle body will harm the paint surface; therefore, wash it off with water and wipe clean quickly if spilled.
- Disconnect the ground terminal from battery. Refer to NOTE>NOTE>BATTERY
.NOTE: For models other than STI model, disconnect the ground terminal from battery sensor.
- Remove the collector cover. (Except for STI model) Refer to INTAKE (INDUCTION) (W/O STI)>COLLECTOR COVER>REMOVAL .
- Remove the intercooler.
STI model:
Refer to INTAKE (INDUCTION) (STI)>INTERCOOLER>REMOVAL .
Except for STI model:
- Remove the starter. (STI model) Refer to STARTING/CHARGING SYSTEMS(STI)>STARTER>REMOVAL .
- Disconnect the clutch hose.CAUTION:
- Cover the hose joint to prevent the brake fluid from flowing out.
- Do not loosen or remove the cap bolts.
- Remove the operating cylinder.
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:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.