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.
2015 Subaru WRX STIFACTORY OEM SERVICE PROCEDURE
Throttle Body: Removal
- Disconnect the ground cable from battery.
- Lift up the vehicle.
- Remove the under cover. <Ref. to REMOVAL , Front Under Cover.>
- Drain approximately 3.0 L (3.2 US qt, 2.6 Imp qt) of coolant. <Ref. to DRAINING OF ENGINE COOLANT , REPLACEMENT, Engine Coolant.>
- Remove the intercooler. <Ref. to REMOVAL , Intercooler.>
- Disconnect the connector (A) from the throttle position sensor, and the connector (B) from the manifold pressure sensor.
- Disconnect the engine coolant hose from throttle body.
- Remove the throttle body from the intake manifold.
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.
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