Replacing the door took a few tries when I replaced the filter on my 2011 Murano. You do have to make sure the top in in properly before you close it completely. Only issue I had was going inverted with my legs over the passenger seat top to access the filter. I just couldn't get the seat back far enough to wedge myself in so that I had a good view of the door and filter. Not the easiest way to replace the cabin air filter.
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