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
RH Side
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.
- Install the knock sensor and connect the connector (A).NOTE:
- Knock sensor must be positioned so that the connector center comes within the range shown in the figure.
- Make sure that the knock sensor and its connector do not touch the adjacent parts.
Tightening torque:
24 N.m (2.4 kgf-m, 17.7 ft-lb)
- Secure the engine wiring harness with the bolts.
Tightening torque:
6.4 N.m (0.7 kgf-m, 4.7 ft-lb)
- Install the fuel pipe insulator No. 3. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>FUEL INSULATOR>INSTALLATION
- Install the intake manifold assembly. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>INTAKE MANIFOLD ASSEMBLY>INSTALLATION
- Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>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.