How many filters does a Subaru Outback have?
Most Subaru Outback models have three serviceable filters: the engine air filter, the cabin air filter, and the engine oil filter. In modern models, there isn’t a regularly replaceable fuel filter; filtration is integrated into the fuel system and not user-maintained.
Which filters you’ll typically replace during routine service
The following filters are the ones most owners encounter during standard maintenance visits. Each plays a distinct role in protecting the engine and ensuring passenger comfort.
- Engine air filter — located in the intake housing; replaced at regular intervals to keep debris out of the engine and maintain performance.
- Cabin air filter — sits behind the glove box; replaced to improve interior air quality and HVAC efficiency.
- Engine oil filter — part of every oil change; removes contaminants from the engine oil to protect engine wear.
Not every filtration element is a service item for routine maintenance, and some filtration functions are designed to operate without a user-replaceable filter.
Filters that are not typically replaced or are internal
Beyond the three common serviceable filters, a couple of filtration elements exist that aren’t part of standard, user-driven replacement schedules.
- Fuel filtration — in modern Outbacks, filtration is integrated into the fuel pump assembly inside the fuel tank; there is generally no separate, replaceable fuel filter for routine maintenance.
- CVT transmission filtration — the Lineartronic CVT uses internal filtration; there is no routine external transmission filter replacement for ordinary maintenance.
For precise guidance on your year and engine, consult the owner’s manual or a qualified Subaru technician, as configurations can vary by generation and market.
Year-by-year considerations
Filter configurations can shift with different generations of the Outback. Early models may have cosmetic or access differences for filter housings, while newer engines sometimes use different cabin filter housings or intake designs. Always verify against your specific model year and engine code to confirm the exact maintenance needs.
Summary
In short, a typical Subaru Outback has three serviceable filters: the engine air filter, the cabin air filter, and the engine oil filter. Modern models generally do not feature a separate, replaceable fuel filter, and the CVT’s internal filtration is not a routine service item. Always check your exact year and engine configuration in the owner’s manual for precise maintenance guidance.
Can I just clean my cabin air filter instead of replacing it?
Yes, you can clean a cabin air filter, especially if it's only lightly dirty or you are in a pinch between replacements, but it's not a substitute for regular replacement, as cleaning doesn't restore its original efficiency. For a deep cleaning, vacuum the filter and then rinse it with a low-pressure hose or a mild soapy water solution, making sure to let it air dry completely before reinstallation.
Cleaning a cabin air filter
- 1. Locate and remove the filter: Check your owner's manual or online resources for the specific location, which is often behind the glove box.
- 2. Remove loose dirt: Tap the filter to shake off large debris. Use a vacuum cleaner to remove as much loose dirt as possible.
- 3. Clean the filter:
- Vacuum: Use a vacuum cleaner with a brush attachment to go over the filter's surface.
- Wash (for reusable filters): For a deeper clean, you can use a low-pressure hose to rinse water from the clean side to the dirty side. You can also soak it in a solution of soapy water for at least 10 minutes, then rinse it thoroughly with fresh water.
- Air dry: Allow the filter to air dry completely, preferably in the sun. Only reinstall it when it is fully dry.
- 4. Reinstall: Place the filter back in the housing, making sure to orient it correctly according to any airflow arrows on the filter.
When to replace instead of clean
- If the filter is heavily contaminated or heavily soiled.
- If the filter is damaged or torn.
- If the filter is a paper type that is not designed to be cleaned and washed.
- If you notice reduced airflow, musty odors, or poor heating/cooling performance, it's best to replace the filter for optimal performance and air quality.
Are air filters and cabin air filters the same?
No, an air filter and a cabin filter are not the same; they serve different purposes in a vehicle. An engine air filter cleans the air that goes into the engine for combustion, while a cabin air filter cleans the air that enters the vehicle's interior for the occupants to breathe.
This video explains the difference between cabin and engine air filters: 30sAuto GearYouTube · Jul 30, 2023
| Feature | Engine Air Filter | Cabin Air Filter |
|---|---|---|
| Location | Part of the engine's intake system | Behind the dashboard, in the climate control system's air intake |
| Primary Function | Protects the engine from dirt and debris | Cleans the air entering the passenger cabin |
| Impact of Clogging | Reduced engine performance, decreased fuel efficiency, and potential engine damage | Restricted airflow from vents, poor heating/cooling performance, and unpleasant odors |
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How many air filters are in a Subaru Outback?
two air filters
Your vehicle has two air filters: a cabin air filter and an engine air filter. Both car air filters are crucial for the overall performance of your vehicle, but they serve different roles. The Serra Subaru of Traverse City service pros are here to help you compare your cabin air filter vs.
Where is the air filter on a Subaru Outback?
The Subaru Outback has two air filters: the engine air filter, located under the hood in a black box on the passenger side of the engine bay, and the cabin air filter, found behind the glove box in the passenger footwell. To access the engine air filter, open the hood and release the clips on the filter box on the passenger side of the engine bay. To access the cabin air filter, open and empty the glove box, then lower it to access the filter door behind it.
You can watch this video to see how to change the engine air filter: 45sFix and PlayYouTube · Aug 15, 2025
Engine air filter
- Location: In the engine bay, within a black plastic housing on the passenger side.
- How to access: Open the hood and find the large plastic box with clips. Release the clips to open the box and access the filter inside.
- How to replace: Open the clips, lift the top of the airbox, and pull out the old filter. Insert the new filter, making sure it's seated correctly, and close the box, securing the clips.
You can watch this video to see how to change the cabin air filter: 1mTRQYouTube · Aug 26, 2025
Cabin air filter
- Location: Behind the glove box.
- How to access: Open the glove box and remove its contents. You may need to detach a damper arm and squeeze the sides of the glove box to let it drop down. This will expose the filter access door.
- How to replace: Squeeze the clips on the filter door to open it. Slide out the old filter, noting the airflow direction arrow. Insert the new filter with the arrow pointing correctly, close the door, and then re-hang the glove box.
