The K&N xA / xB Drop In Air Filter (part 33-2211) is a panel-style replacement element made from layered, oiled cotton gauze. The manufacturer designs it to improve airflow while still trapping contaminants, and it is marketed as a horsepower and acceleration upgrade. Because the element is washable and reusable, one filter can take the place of repeated disposable paper replacements, and it is backed by the manufacturer's No-Hassle Lifetime Limited warranty. The filter is pre-oiled and sized to drop into the factory airbox, so the stock paper element comes out and the K&N goes in with no modifications. Searches for "Scion xA drop in air filter," "Scion xB washable high flow filter," and "Toyota Echo K&N 33-2211" point to the buyers this part serves.
Verify fitment before you order, because listed years differ between sources. The manufacturer's page lists Scion xA and xB from 2003 to 2007, Toyota Echo from 2000 to 2005, and Yaris from 1999 to 2004. Confirm your exact model year and engine with the manufacturer's fitment tools. Installation is a basic airbox job: open the housing, lift out the paper filter, seat the K&N, and close the lid so it seals. When cleaning later, use the manufacturer's washable-filter process and re-oil with the specified 0.53 oz (16 ml) of filter oil.
The manufacturer lists the Scion xA and xB from 2003 to 2007, the Toyota Echo from 2000 to 2005, and the Yaris from 1999 to 2004. Fitment details vary across sellers and enthusiast sources, so confirm your model year and engine with the manufacturer before you buy.
Yes. The manufacturer describes the filter as washable and reusable. It is pre-oiled from the factory, and the manufacturer specifies 0.53 oz (16 ml) of filter oil for re-oiling after cleaning.
The manufacturer's product information references its No-Hassle Lifetime Limited warranty. Some sources list a 10-year or million-mile term instead, so check the current warranty terms with the manufacturer.
This is a drop-in swap rather than a modification. The manufacturer states the filter fits the factory airbox without modifications, so the job amounts to removing the stock paper element, placing the K&N in the same position, and closing the airbox so the lid seals. No special tools are called out by the manufacturer. Check that the new panel sits flat and that no gaps let unfiltered air bypass the element. The filter arrives pre-oiled, so do not add oil before first use. Clean and re-oil at intervals that suit your driving conditions, and avoid over-oiling, which can contaminate the mass airflow sensor on many vehicles.
