Introduction
Before taking out your 2009-2013 Mazda 3's cabin air filter, make sure you've got the right replacement filter. If you're not sure, go to a nearby car parts store like Autozone or O'Reilly's Auto Parts. They will help you find the correct filter. This replacement's is difficulity is moderate, but with correct filter and a phillips head screwdriver you're all set for an easy and cost-effective upgrade to your Mazda 3's air quality.
Tools
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            Remove the two 2 mm Phillips screws securing the bottom of the filter housing. 
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            Pull the tab at the top of the housing cover to remove it. 
 
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            Pull out one of the two air filters. 
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            The second filter, located on top of first filter, should fall into the same place as you remove the first one. 
 
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            Insert the new filters into the slots. 
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            Position the first filter on top. 
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            Ensure the second air filter fits tightly underneath the one on top. 
 
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            Position the black panel under the passenger side dashboard. 
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            Clip the two tabs back into place by pushing on them to secure the panel. 
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            Align the side panel back under the middle console. 
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            Secure the panel by pushing it back into place from the top and the bottom. 
 
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One comment
Thank you very much, A complete guide is rare now and days
Konny -