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.
2018 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
Engine Control Module (ECM): Removal
WARNING: This page is about a different variant/trim than selected.
- Disconnect the ground cable from battery.
- Remove the glove box. Ref. to EXTERIOR/INTERIOR TRIM>Glove Box>REMOVAL .
- Disconnect the connectors from the ECM and driver's control center differential control module.
- Push down the claws, and remove the relay block.
- Remove the bolts and nuts, and remove the ECM.
- Remove the driver's control center differential control module.
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.