Denso 453-4016 Cabin Air 🌬️ Filter - Optimize Indoor Air Quality Review

Thank goodness for YouTube. Each filter is unique and requires a specific orientation to fit within the housing. You'll save yourself a few minutes by putting the old ones in the same way you take them out of the case when installing the new ones.

Installation instructions could be clearer or filter markings could be better. This is a two piece filter which is a little tricky to install as it sits under the dash and some parts have to be removed before you can access the filter housing. See YouTube video for replacement instructions.

I had to replace the old one as it was very dirty and clogged. This is for my 2006 Mazda 3 and it fits great but getting the job done is a bit tricky but still doable on my own. I checked the DIY YouTube video for the installation for my specific machine. Shipping was fast and reliable to avoid handling issues. Would buy again!

The product itself is good but Mazda's designers really failed when they placed the cabin filter where they did. Access is terrible and I plan on contorting and taking about 45 minutes to get it. I found a few YouTube videos that REALLY helped show what needs to be removed and disabled to get the old ones (2 separate filter blocks). and that obscenity generator back.