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
Master Cylinder: Disassembly
WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the oil reservoir COMPL.
- Place the master cylinder assembly between aluminum plates and fix it on a vise.CAUTION:
Be careful not to tighten a vise excessively.
- Drive out the pin using a punch and a hammer to remove the oil reservoir COMPL.
- Place the master cylinder assembly between aluminum plates and fix it on a vise.
- Remove the seal reservoir from the master cylinder assembly.
- Except for electric brake booster model
- Electric brake booster model
Factory Service Tools
Use the Manual With the Right Hardware
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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.