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 STIFACTORY OEM SERVICE PROCEDURE
SI-DRIVE (SUBARU Intelligent Drive) Selector: Inspection
- Check that the multi select switch does not have deformation, cracks, or damage.
- Check the resistance between the terminals at the SI-DRIVE selector.
Switch position Terminal No. Standard Sport (when turning the SI-DRIVE selector to the left) 5 and 8 Less than 1 Ξ© Intelligent (when pressing the SI-DRIVE selector) 1Β±0.05 kΞ© Sport Sharp (when turning the SI-DRIVE selector to the right) 3.67Β±0.1835 kΞ©
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:
- 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.