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Mazda CX-9 Cabin Air Filter Replacement Guide
How to clean or replace the HVAC system's cabin air filter element in a 2008 to 2012 Mazda CX-9 SUV with pictures.

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Mazda CX-9 Glove Box
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Open Glove Box
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Release Filter Access Panel

This automotive "how-to" guide was specifically written to assist owners of the 2008 to 2012 Mazda CX-9 crossover SUV in removing, cleaning and replacing the A/C system's cabin air filter element.

Owners of other Mazda vehicles such as the MAZDA2, MAZDA3, MAZDA6, MX-5 Miata, RX-8, MAZDASPEED3, MAZDA5, Tribute SUV, and CX-7 crossover may also find this guide to be helpful.

A few new replacement HVAC cabin air filter elements compatible with the 2008-2012 Mazda CX-9 include the following with their respective part numbers: Purolator C25876, TYC 800111P, NPN W0133-1821502, and the Beck Arnley BEC0422151.

No tools are needed to clean or replace the A/C cabin air filter element in a 08-12 Mazda CX-9.

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Filter Access Panel Open
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A/C Blower Motor Housing
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Release Clip On Left
The first step is to open the glove box and then locate the very convenient access panel at the rear of the glove box. Push down on the two retaining clips at the top of the access panel to release it and lower it down to the front of the glove box.

After you swing down the access door in the glove box, you'll be able to see the white plastic A/C blower motor housing and the rectangular cabin air filter cover.

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Swing Out Filter Cover
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Cabin Filter Cover Removed
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Filter Cover Clip Close Up
Release the cabin air filter cover by pushing inwards on the retaining clip located on the left side. Then swing the left side of the filter cover towards yourself and pull it away from the blower motor housing.
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Cabin Filter In Housing
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Slide Out Cabin Filter
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Dirty Cabin Filter Element


 
Slide out the old cabin air filter element from the A/C blower motor housing.

If the old filter isn't very dirty, turn it over and tap out the large pieces of debris such as insects, leaves, and dirt. It's also a good idea to use a wet/dry shop vacuum to thoroughly remove any dust on the filter.

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Clean With Shop Vacuum
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Slide In Cabin Filter
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Cleaned Filter In Housing
Then slide the cleaned or new cabin air filter element back into the blower motor housing with the pleats facing upwards.
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Insert Right Side of Cover
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Replace Filter Cover
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Push Clip To Secure In Place
Replace the cabin air filter's rectangular plastic cover by first inserting the right side into the slot on the right. Then push the left side forwards until you hear the retaining clip click into place.
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Replace Access Panel
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Filter Access Panel Closed
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Close Glove Box
Swing the access panel door in the glove box upwards and push on it to snap the two retaining clips at the top in place. Then close the glove box to complete the job.

For more, check out my Mazda CX-9 Repair & Maintenance Guides page.
 

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