K&N’s replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration.
These filters are washable and reusable and are custom designed to fit into your existing smart car factory air box. Their drop-in design means adding performance is simple. You simply remove your smart car disposable air filter and replace it with a K&N.
K&N stock replacement air filters are covered by their famous K&N Million-Mile Limited Warranty™ and will be the last air filter your smart will ever need.
Increase you mileage, performance, save money by eliminating the need to buy disposable filters and at the same time cut down on waste.
Don't forget to check out our other drop in replacement filter options.
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
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Call us at 512-982-9393 (Austin, TX) or
562-981-6800 (Signal Hill, CA)
and get assistance from one of our sales team members!
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For over 50 years, K&N® has been an industry-leader in automotive filtration and technology—offering products to increase performance, protection, and longevity in thousands of vehicle applications for consumers worldwide. K&N® offers a wide range of performance products, including air intake systems, oil filters, cabin air filters, and home air filters, with a reputation for exceptional quality and customer service that millions of customers trust. Our creative spirit, passion for pushing limits, and innovative product design form the foundation of our brand.
