K&N High-Flow Engine Air Filter 33-2286 — Lifetime Washable Drop-In for 2004–2021 Nissan/Infiniti

The K&N High-Flow Original Lifetime Engine Air Filter (33-2286) is a washable, reusable performance air filter designed to boost airflow and protect engines in select 2004–2021 Nissan and Infiniti vehicles.

This drop-in replacement filter swaps into the factory air box and is engineered to increase airflow compared with standard paper filters while trapping harmful particles. Built with multiple layers of treated cotton gauze and a durable frame, the filter is pre-oiled and ready to install for quick, measurable upgrades in throttle response and long-term reliability. Backed by K&N’s limited lifetime warranty and manufactured in the U.S., it offers a low-maintenance, eco-friendlier alternative to disposable filters.

How will this filter affect my vehicle’s responsiveness and power?

Because the K&N media allows more air to reach the engine, many drivers notice crisper throttle response and modest gains in acceleration. The design focuses on improving airflow without sacrificing effective particle capture, balancing performance with protection.

• State-of-the-art cotton gauze media increases airflow compared to stock paper filters.
• Engineered to help improve horsepower and acceleration under normal driving conditions.
• Pre-oiled at the factory to ensure consistent performance from the moment of installation.

How often will I need to clean or maintain this air filter?

K&N filters are washable and reusable, reducing the frequency of replacements. Under typical highway driving, the filter can go long intervals between cleanings, meaning fewer maintenance stops and less waste.

• Clean roughly every 75,000 miles in normal highway driving scenarios.
• Shorten cleaning intervals if you drive frequently in dusty or off-road environments.
• Simple cleaning kit and instructions available from K&N for straightforward servicing.

Will the K&N filter fit my Nissan or Infiniti model and how easy is installation?

This filter is designed as a direct stock replacement for specific Nissan and Infiniti models from 2004–2021. Installation is a basic, tool-light procedure that typically takes only a few minutes since the filter drops into the factory air box.

• Compatible with models such as QX56, Armada, Frontier, Pathfinder, Titan, Xterra, and NV-series vans (refer to application list).
• Pre-fitted form factor matches OEM dimensions for a seamless fit.
• Installation requires minimal tools and mechanical skill — no modifications necessary.

What makes this filter durable and environmentally preferable?

The K&N High-Flow filter uses a robust multi-layer construction and premium materials intended to last for the life of the vehicle. Because it’s washable and reusable, you avoid recurring disposable-filter purchases and reduce landfill waste.

• Four layers of treated cotton gauze create an effective particle-trapping mesh.
• Rugged frame and advanced construction for long service life and repeat cleaning.
• Reduces the need for multiple disposable filters over many years, lowering environmental impact.

Who this is for: Drivers of compatible Nissan and Infiniti trucks, SUVs, and vans who want an easy, long-lasting upgrade that prioritizes airflow and repeated use over disposable replacements. It’s a good fit for daily drivers seeking improved throttle response, fleet owners looking to cut parts waste, and DIY enthusiasts who prefer a straightforward install and periodic cleaning instead of frequent filter changes.

Compatible models include (but are not limited to): 2004–2010 INFINITI QX56; 2005–2015 NISSAN Armada; 2005–2019 Frontier; 2012–2021 NV1500, NV2500, NV3500; 2005–2012 Pathfinder; 2004 Nissan Pathfinder Armada; 2004–2015 Titan; 2005–2015 Xterra. Always confirm fitment with vehicle year and engine code before purchase.