K&N 33-5120 High-Flow Washable Engine Air Filter

The 33-5120 is a 4-layer oiled cotton gauze panel filter that drops into the factory air box of the 2022-2026 Honda Civic's 1.5L turbo engine (L15B7 on Sport, EX-L, and Touring trims, L15CA on the Si), replacing Honda OEM part 1722064AA00. K&N states a 75,000-mile cleaning interval under normal highway driving; the platform only launched for model year 2022, so no owner has yet reached that first interval at typical mileage, and single-filter multi-cycle cleaning data does not exist yet. K&N publishes an ISO 5011 filtration-testing methodology across its lineup and cites high-90s percent efficiency figures for sibling 33-series filters, but no SKU-specific published percentage was found for the 33-5120. The manufacturer markets increased horsepower and acceleration; no independent dyno test isolating this drop-in filter on a Civic 1.5T was found to confirm or contradict that claim.

Right pick for a 2022-2026 Civic 1.5T owner (Sport, EX-L, Touring, or Si) who wants to stop buying disposable filters over a long ownership horizon and is comfortable with an occasional cleaning and re-oiling step. The Honda OEM cross-reference and two independent parts-database confirmations make fitment risk low for the 1.5T engine specifically. Skip if your Civic is a base LX or Sport trim with the 2.0L naturally aspirated engine, or the 2.0L turbo (K20C1): both use a different airbox and the Honda OEM part 17220-5BA-A00, not the 1722064AA00 this filter replaces, so the 33-5120 does not fit either one. Also skip if you would rather wait for independent dyno and multi-cycle cleaning data to accumulate on this newer platform before committing to a performance filter.

Passive replacement component; no chemical exposure pathway during installation or removal, and no SDS applies. The product carries a California Proposition 65 warning on K&N's own product page (the standard automotive-component label), reflected as a small accessory health adjustment rather than a use-phase exposure hazard. The environment score of 6 reflects the washable reusable lifecycle credited for its structural waste reduction and recyclability advantage over a disposable filter, held back from the top of the reusable range because the 11th-gen Civic 1.5T platform is too new for community-confirmed multi-cycle mileage data. Filter cleaning and re-oiling with a K&N Recharger kit involves a solvent cleaner and petroleum-based oil; review that product's safety data separately for PPE guidance.

An engine air filter only does its job if it actually fits your engine, and the 11th-gen Civic alone spans three different airboxes across its trims. Before you buy, find the engine air filter for your vehicle in the CarCareTruth air-filter finder, pick your year, make, and model, and we'll show the filters that fit it, ranked by our independent score and cross-checked against multiple catalog fitment sources.