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
Oil Pressure Switch: Installation
- Apply liquid gasket to the oil pressure switch threads.
Liquid gasket:
THREE BOND 1324 (Part No. 004403042) or equivalent
- Install the oil pressure switch to the chain cover.
Tightening torque:
18 N.m (1.8 kgf-m, 13.3 ft-lb)
- Connect the terminal to the oil pressure switch.NOTE: The oil pressure switch harness must be tightened within the range of a 90° angle as shown below.
Tightening torque:
1.5 N.m (0.2 kgf-m, 1.1 ft-lb)
- Attach the rubber cap.
- Connect the ground terminal to battery sensor. Refer to NOTE>NOTE>BATTERY .
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.