I have a 4cyl SE, my owners manual says NOTHING about a pollen filter. I can't say that I miss it, I'm not really sure how much benefit it is when you drive with the windows down on intercity or short commutes when the a/c isn't required. My van has one, and it's a PIA to replace and it's $$$. I think ford skipped a the cabin filter for the Fusion, for now anyway. I'd much rather have a back up sensor.