2006 Toyota Solara Owners Manual - Page 213

'06 Solara_U (L/O 0502) When installing the filter in the filter case, keep the "° UP" mark pointing up. 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. 200 2006 SOLARA from Feb. '05 Prod. (OM33667U)