Cabin Air Filters — Price Comparison

Cabin Air Filters for 2011 Subaru Legacy

The cabin air filter on a 2011 Subaru Legacy cleans everything that comes through the HVAC system, and most owners replace it far less often than the 12-month interval filter makers recommend. An aging filter cuts airflow, makes the A/C work harder, and lets pollen and exhaust particulates into the cabin.

We compared 3 offers across major retailers for the 5th Gen platform (2010–2014 5th Gen). Prices range from $9.99 to $18.99 as of the last update.

Best picks

• Best overall: An activated-carbon or HEPA-grade filter — carbon layers absorb exhaust odors in traffic, and finer media catches smoke and smog particles.
• Best budget: A standard particulate filter. It handles dust and pollen fine; you mostly give up odor absorption.

What to look for

• Airflow direction arrows must point the right way on installation — backwards filters degrade quickly.
• If you park under trees or drive dirt roads, halve the replacement interval.
• Carbon filters are worth the upcharge for city commuting; less so in rural areas.

Sedan note: parts for high-volume sedans are commodity-priced, which works in your favor — the brand-name option frequently costs within a few dollars of the budget pick. Buy on warranty and reviews rather than price alone.

Fitment note

Verified for 2011 Subaru Legacy (5th Gen). Fits 2010–2014 5th Gen generation unless trim-specific exclusions apply. Confirm trim and option codes before ordering.

Prices are affiliate-linked estimates. Confirm current pricing at the merchant before purchase.