How to replace a 2019 Subaru Forester cabin air filter.

Why it deserves attention.

A loaded cabin filter can restrict ventilation airflow. Replacing it correctly restores a clean filter in that air path, but persistent odors or weak airflow may have another cause.

When should you check it?

Check the applicable maintenance schedule and inspect the filter for loading or damage. Reduced ventilation airflow can be a reason to inspect it, but a new filter will not resolve every odor or airflow problem. Persistent symptoms need a separate check.

Get ready

What you need.

See the process

Watch the video.

The vehicle shown is a 2019 Forester. The video demonstrates the glovebox damper, stops, filter assembly, and reassembly. It includes the creator's filter promotion; UpKeep is not the publisher.

Subaru Forester 2019 Cabin Air Filter Replacement | AQ1288 · Filterheads

Preparation

Before you start.

• Park, set the parking brake, and switch the ignition and ventilation fan off.
• Empty the glovebox. Support it while releasing its stops so it does not fall or strain the damper.
• Compare your housing with the walkthrough. Brittle or damaged plastic needs care; do not force the glovebox or filter latches.

The lesson

Step-by-step instructions.

1. 01

   Open the glovebox and detach the damper.

   With the glovebox supported, gently release the damper arm from its attachment on the side, as shown in the video.

2. 02

   Release the glovebox stops.

   Gently squeeze the glovebox sides inward until the stops clear the dash opening. Lower it carefully to expose the filter housing behind it.

3. 03

   Release and remove the filter assembly.

   Note the front markings and latch positions. Release the retaining tabs and slide the old filter assembly straight out, keeping debris from falling into the blower opening.

4. 04

   Match the replacement and its orientation.

   Compare the frames and attachment points. On the assembly shown, the front is marked UP. An UP arrow describes installation position; an AIR FLOW arrow describes air movement. They are not interchangeable. Follow the replacement instructions for its marking.

5. 05

   Install and secure the filter.

   Remove accessible loose debris around the opening with the fan off. Slide the correctly oriented assembly fully into place and engage its retaining tabs. Do not crush the element or force a mismatched frame.

6. 06

   Restore the glovebox.

   Raise the glovebox, ease its side stops back into position, and reconnect the damper arm. Open and close it to confirm it moves normally and latches.

Common mistakes to avoid.

• Letting the glovebox hang from its damper or forcing its plastic stops.
• Assuming an UP arrow and an AIR FLOW arrow must point the same way.
• Installing a loose paper element where a complete framed assembly is required.
• Expecting a filter alone to fix persistent odor, water intrusion, or weak airflow from another fault.

Finish the job

Final checks.

• The filter assembly is seated and latched, and the glovebox damper is attached.
• With everything reassembled, switch the ignition on and run the fan. Listen for a new rattle or rubbing noise. Switch it off and recheck the installation if one appears.
• Record the date and mileage. Use the exact vehicle schedule for replacement timing. Persistent airflow or odor concerns need further investigation.

How UpKeep approaches the work.

UpKeep checks the filter and its frame, confirms the replacement and orientation, and checks the glovebox and fan operation afterward. Odor, moisture, or airflow concerns that remain are discussed before additional work.