Car Air Filter Size and Part Number Guide

Car air filters do not use one universal size. The safest match combines vehicle fitment, the existing filter number, frame shape, and dimensions.

Need the filter for a specific car?

Use the vehicle lookup to find cabin and engine air filter references by year, make, and model.

Find My Car Air Filter

Start With Vehicle Fitment

Select the model year, make, and model. Then confirm the generation, engine, trim, sales market, and production date when the catalog lists more than one option.

How to Measure an Air Filter

Measure the outside length, width, and depth of the frame. Use the same unit as the catalog and note rounded corners, tabs, seals, and stepped edges.

How Part Number Cross-References Work

An OEM number identifies the factory application. Aftermarket brands publish cross-references for compatible products. A cross-reference is useful, but the final check should still match the vehicle and physical filter.

What to Do When Numbers Conflict

Use the VIN, production date, old filter label, and OEM catalog to resolve the conflict. Do not choose only because one filter has nearly identical dimensions.

Frequently Asked Questions

Are air filter dimensions exact?

Catalog dimensions can be rounded. Compare the part number, frame design, and vehicle application as well.

Can one part number fit several vehicles?

Yes. A filter can fit multiple vehicles when they use the same housing, but each application should still be verified.

What if the old filter number is unreadable?

Use the VIN, owner manual, OEM catalog, or a trusted parts supplier to identify the application.

Should I measure the media or the frame?

Measure the outside edges of the frame because the frame determines how the filter seats in the housing.