1. Disconnect the ground cable from battery.
2. Disconnect the connector (A) from the mass air flow and intake air temperature sensor and remove the clip (B).
3. Loosen the clamps (A) which connect the air cleaner case to intake boot.
4. Remove the clip (B) securing the upper side of air cleaner case.
5. Remove the air cleaner case (rear) and air cleaner element.
6. Install in the reverse order of removal.
CAUTION:
Be sure to use SUBARU genuine air cleaner element depending on the engine type when replacing the air cleaner elements. Using other air cleaner element may affect the engine performance.
NOTE:
• Check that there are no foreign objects in the air cleaner case.
• When installing the air cleaner case (rear), align the protrusion of the air cleaner case (rear) to the hole on the air cleaner case (front) to install.
Tightening torque:
Clamp (A)
3 N·m (0.3 kgf-m, 2.2 ft-lb)
1. Disconnect the ground cable from battery.
2. Remove the air intake duct (rear). 
3. Disconnect the connector (A) from mass air flow and intake air temperature sensor.
4. Remove the clip (B) from the air cleaner case.
5. Open the air cleaner case, and remove the air cleaner element.
6. Install in the reverse order of removal.
CAUTION:
Be sure to use SUBARU genuine air cleaner element depending on the engine type when replacing the air cleaner elements. Using other air cleaner element may affect the engine performance.
NOTE:
Check that there are no foreign objects in the air cleaner case.