My filter was never replaced, partly due to its low mileage and my neglect. Not sure what a dealer would charge, but after looking at a video on YouTube decided to do it myself. I bought a Toyota OEM filter ( Part # 87139-YZZ03 ) on ebay from Superstition Springs Lexus of Arizona for $30. It is a charcoal type filter, and supposedly a specification unit. I had a difficult time removing the shelf to gain access to 2 more panels to remove the old filter. Although I followed the suggested way to do that, it took all my strength to break it free from the compartment floor. Upon completing the relatively easy removal of the filter, I tried to insert the new replacement one, and discovered it was about 3/4" to wide. Also, the filter"up" arrow was on a side pleat, and not on the front panel. After cutting the filter to fit, the reassembly was simple. I contacted the vendor to suggest they check with Toyota as to the proper filter dimension.but they haven't replied yet. Beware.