The engine air filter element of a 1st generation (2009, 2010, 2011, 2012 & 2013) Kia Soul with either the 1.6L or 2.0L motors should be cleaned at every oil change and replaced when dirty. Check out my DIY tutorial for the procedure including replacement part numbers by clicking on the text link or thumbnail image below.
Kia Soul Engine Air Filter Replacement Guide
