The K&N 33-2375 is a washable, reusable panel air filter made from layered, oiled cotton gauze, sized to drop into the factory airbox of the 1.8-liter four-cylinder Nissan Versa. The manufacturer lists it for 2007-2012 Versa L4-1.8L fuel-injected applications. Against a disposable paper element, the appeal is cost of ownership: you clean and re-oil it instead of buying a new filter at each service, and it carries K&N's No-Hassle Lifetime Limited warranty. One owner on a user forum reported a slight increase in both mpg, and throttle response off the line. Other enthusiasts consider the power gain marginal, so this is best treated as an affordable airflow upgrade rather than a power package.
Installation is designed to be straightforward. The filter is intended to replace the stock element without modification, and owners on user forums have reported completing the swap in under five minutes. Clean the airbox sealing surface before seating the new element, and confirm the filter sits in the box as intended. K&N's general install guidance notes that the pressure needed to fasten the clips with a K&N filter will be slightly more than with an OEM type that has a soft foam seal. Searches for 2007 Nissan Versa 1.8 drop-in filter, Versa 33-2375 airbox upgrade, and reusable Versa panel filter tend to lead to this part.
The manufacturer lists the 1.8L L4 fuel-injected Versa for 2007 through 2012. Fitment details vary across sources, so confirm your specific model year and trim with the manufacturer's fitment lookup before ordering.
The manufacturer describes the filter as a drop-in design built to fit the factory airbox. Owners on user forums have reported no modifications were needed.
This is a beginner-friendly job that generally requires only basic hand tools. Remove the airbox lid by releasing its clips or screws, lift out the stock element, wipe down the housing and sealing surfaces, and drop in the K&N with the engraving facing the orientation shown on the filter. Reseat the lid fully and fasten the clips evenly. Per K&N's general guidance, make sure the filter and lid are lined up before fastening, and stop if the airbox begins to flex noticeably. Owners on user forums recommend cleaning and re-oiling the filter at regular intervals to keep it performing.
