Parts for your 2020 Subaru Impreza-Cabin filter

2020 Subaru Impreza Cabin Filter

According to Subaru’s own technical literature, the 2020 Subaru Impreza is fitted with a cabin air filter (often called the air conditioner or pollen filter). The 2020MY Impreza Owner’s Manual includes an “Air conditioner filter” section that specifies periodic replacement, and the Subaru Service Manual (HVAC section) details the filter’s location behind the glovebox and the replacement procedure. Subaru’s Electronic Parts Catalogue also lists an A/C filter element for 2017–2021 Impreza models. So, a cabin filter absolutely applies to this vehicle.

In everyday use, the Impreza’s cabin filter quietly does the heavy lifting—capturing dust, pollen, road soot and other fine particles before they get blasted through the vents. That keeps the cabin air fresher, helps with demisting by maintaining healthy airflow across the heater core and evaporator, and protects the HVAC hardware from clogging. For those dealing with city traffic, rural dust, or bushfire smoke, an activated carbon variant can further reduce odours and some exhaust gases for a more comfortable drive.

For servicing, Subaru’s schedules call for periodic replacement of the air conditioner (pollen) filter, in local Australian and New Zealand conditions a practical target is every 15,000–30,000 kilometres or 12–24 months, whichever comes first, with shorter intervals if the vehicle sees dusty roads, lots of stop–start commuting, or seasonal smoke. Subaru documentation notes the filter is a wear item—once loaded up, airflow drops and the HVAC works harder.

Common signs it’s due include:

• Reduced airflow at the same fan speed
• Musty or stale odours on start-up
• Slower demisting/defogging performance
• Fan noise rising without much breeze

Replacement on the Impreza is straightforward and typically sits behind the glovebox. While exact steps are in the Service Manual, the broad strokes are to lower the glovebox, remove the filter access cover, slide out the old element, and fit the new one with the airflow arrow oriented correctly. It’s smart to clear leaves and debris from the housing at the same time. Cabin filters aren’t designed to be washed, at best, a light vacuum may freshen a lightly dusty element, but proper maintenance means replacement with a genuine-spec filter to protect the HVAC and keep air quality up.

Keeping this filter fresh is a small job that pays off with cleaner air, smoother demisting, and a happier blower motor—ideal for Aussie and Kiwi conditions.

Popular questions about 2020 Subaru Impreza cabin filters

Where is the cabin filter located on a 2020 Impreza?
The cabin filter sits behind the glovebox. Lower the glovebox, unclip the access panel, and the rectangular filter tray slides out. Subaru’s Service Manual for the HVAC system shows the exact clips and sequence.

How often should the cabin filter be replaced in Australia or New Zealand?
Plan on every 15,000–30,000 km or 12–24 months. Go shorter if driving in dusty regions, heavy urban traffic, or during smoke season, as the filter will load up faster and restrict airflow.

Can the existing filter be cleaned instead of replaced?
Cabin filters are consumables. A gentle vacuum can remove loose dust, but once the media is saturated or musty, it won’t recover. Replacement is the proper fix to restore airflow and filtration.