The K&N 33-2477 is a washable, reusable panel air filter from the brand's High-Flow line, built for the 2.4-liter four-cylinder in the Honda CR-V. Its cotton gauze media is layered and oiled, a design the manufacturer says improves airflow while still capturing contaminants. Service intervals can reach about 50,000 miles, though the manufacturer ties that figure to local driving conditions. The filter carries a no-hassle lifetime limited warranty. Owners on user forums are more measured about the payoff, saying the performance difference shows up mainly at higher engine speeds rather than in daily driving.
Fitment is listed for 2012-2014 Honda CR-V L4-2.4L F/I models. The element's outside dimensions are 10.219 in outside length, 7.875 in outside width, and 1.125 in height, and it is pre-oiled and ready to drop into your factory air box. For a driver searching for a washable high-flow CR-V 2.4L airbox filter upgrade, the install is a short job: the 5-10 minute procedure typically calls for only a screwdriver, according to the manufacturer. Owners on user forums describe corner fasteners that only need loosening rather than full removal, though fastener type varies by model year, so check the installation sheet before you start.
The manufacturer lists this part for 2012-2014 CR-V 2.4L models only, so confirm with the manufacturer before ordering for any other year.
The manufacturer states that the filter will not void your factory warranty.
The manufacturer offers KNA-2477 as a separate 18,000-mile filter for the same vehicle, and it is listed as a one-time-use element, so it is not the washable, reusable 33-2477.
The manufacturer rates this as a basic, screwdriver-only swap that typically takes 5-10 minutes. Open the factory airbox, remove the old element, and seat the new pre-oiled filter in the same orientation. Because owners on user forums report that fastener layout differs between generations, check the manufacturer's installation PDF before you start, and do not over-oil the element when you clean or service it.
