Genuine Subaru Engine Air Filter Element removes millions of microscopic pollutants and dust particles. Remember to change your engine air filter once a year or every 7,500-15,000 miles depending on conditions where you are. Check your owner's manual for the replacement schedule that's right for your Subaru. Don't settle for aftermarket components of questionable quality and always insist on Genuine Subaru Engine Air Filter Element replacements. Subaru Part Number: 16546AA210 Fits: 2017-2023 Impreza 2018-2023 Crosstrek