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The K&N Engineering KNA-5026 engine air filter is designed as a long-life replacement for select factory air box applications. It fits 2015–2016 Hyundai Sonata models and 2016 Kia Optima models listed in the application data, providing a convenient alternative to traditional disposable air filters.
Featuring premium synthetic or cellulose-blend filter media, depending on the application, this filter delivers up to 99% engine protection. Its 18,000-mile service interval is intended to provide long service life compared with traditional 12,000-mile disposable filters.
The filter is designed to meet or exceed OEM specifications and installs directly into the factory air box, typically without tools. It is sold as one filter and is intended for automotive applications. California Air Resources Board approval is not indicated in the product data, and the product requires the applicable CARB acknowledgement.
Features:
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
