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 Forester BaseFACTORY OEM SERVICE PROCEDURE
Air Cleaner Case: Installation
- Install the air cleaner case bracket and install the cushion.NOTE: Align the protrusion of the cushion with the cutout portion on the air cleaner case bracket.
Tightening torque:
7.5 N.m (0.8 kgf-m, 5.5 ft-lb)
- Install the air cleaner case (front).
Tightening torque:
Bolt
6 N.m (0.6 kgf-m, 4.4 ft-lb)
Nut
7.5 N.m (0.8 kgf-m, 5.5 ft-lb)
- Install the air cleaner element and the air cleaner case (rear). Ref. to INTAKE (INDUCTION) (H4DO)>Air Cleaner Element>INSTALLATION .
- Connect the air intake boot.
Tightening torque:
3 N.m (0.3 kgf-m, 2.2 ft-lb)
- Connect the connector to the mass air flow and intake air temperature sensor, and secure the harness with clip.
- Install the air intake duct.
- Connect the ground terminal to battery sensor, Ref. to GROUND TERMINAL REMOVAL OR INSTALLATION .
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.