2007 Toyota Yaris Owners Manual - Page 503
2007 Toyota Yaris Manual
Page 503 highlights
06 12.21 PS19514 When inserting the filter in the filter outlet, keep the arrow pointing up and insert the filter as shown in the illustration above. INFORMATION The air filter should be installed properly in position. The use of air conditioning with the air filter removed may cause deteriorated dustproof performance and then affect air conditioning performance. 2007 YARIS HATCHBACK from Feb. '07Prod. (OM52754U) 167