The engine air filter element in a 2nd generation (2004, 2005, 2006, 2007, 2008 & 2009) Toyota Prius hybrid hatchback 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.
2004-2009 Toyota Prius Engine Air Filter Replacement Guide
