The K&N 33-2324 is a drop-in panel replacement air filter for the 2.5L four-cylinder gas Nissan Frontier. The manufacturer describes it as a High-Flow filter built to deliver high air flow while maintaining filtration levels critical to ensure long engine life. Its cotton gauze media is Washable · Yes, which makes it a reusable alternative to a disposable paper filter.
The case for paying more than a basic filter comes down to reuse and filtration. The manufacturer lists Overall Filter Efficiency · Up To 99% Efficiency, and it calls for a re-oiling amount of 1.57 oz (47 ml). Over the life of the vehicle, a clean-and-re-oil cycle replaces repeated filter purchases. Power gains are not confirmed here, so treat any horsepower claims with caution and check the manufacturer's data before buying for output.
Fitment is the main thing to verify. The manufacturer's listings place this filter on the 2.5L L4 Frontier, but the year coverage differs between sources, so confirm the application against your VIN before ordering. Search terms that fit this part include 2.5L Frontier washable air filter, high-flow cotton gauze drop-in filter, and reusable Nissan Frontier 2.5 engine air filter.
Yes. The manufacturer lists the 33-2324 as washable, and it specifies a re-oiling amount of 1.57 oz (47 ml) after cleaning.
The product is listed for the 2.5L L4 Frontier, but year coverage varies across sources, with some listings showing ranges beyond 2005-2010. Confirm your exact year, trim, and engine against the manufacturer's fitment guide before ordering.
