The engine air filter for the 2GR-FE 3.5L V6 engine of a 3rd generation 2011 to 2014 (and probably also the 2015) Toyota Sienna minivan should be cleaned at every oil change and changed when dirty. To view my DIY tutorial for the procedure with replacement part numbers, click on the text link or thumbnail image below.
Toyota Sienna Engine Air Filter Replacement Guide
