K&N 33-5126 Engine Air Filter

High-Flow Replacement Air Filter

The K&N 33-5126 is a washable, reusable engine air filter built as a drop-in replacement for the factory air box. It uses layered, oiled cotton gauze media to improve airflow while capturing contaminants, and it is backed by K&N's No-Hassle Lifetime Limited Warranty.

• Washable, reusable cotton gauze filter media
• Panel-style design for factory air box installation
• Layered, oiled construction for airflow and contaminant capture
• Flexible frame design for a precise fit
• Up to 99% efficiency rating

Detailed Fitment and Function

Built for drivers who want a direct replacement engine air filter, the K&N 33-5126 is engineered to install easily in the stock air box and deliver long-term service life. Its panel shape, flexible frame, and pre-oiled cotton gauze media make it a practical upgrade for routine maintenance on the Nissan Pathfinder and INFINITI QX60. The 33-5126 is designed for repeated cleaning and re-oiling, reducing the need for frequent replacement while maintaining airflow performance.

This part cross-references Delphi AF10112 for the same application.

What It Helps Address

• Restricted airflow from a dirty or clogged engine air filter
• Frequent replacement of disposable paper filters
• Loss of filtration performance as the filter ages
• Maintenance intervals that call for a reusable filter solution

Installation Notes and Quality

Fits 2022-2026 Nissan Pathfinder, N/A. Fits 2022-2024 INFINITI QX60, N/A. Install in the factory air box as a drop-in replacement and follow K&N re-oiling instructions after cleaning. K&N backs this filter with a No-Hassle Lifetime Limited Warranty.