Sparesbox Blog

What’s the Difference Between a Regular Cabin Air Filter and a Carbon Activated Filter?

By Brad Nash

Mon Aug 24 2015

There are two kinds of filters that can provide clean air to your vehicle’s cabin to keep you and your passengers save. Conventional cabin air filters will separate harmful particles from the air going into the cabin, extracting things like pollen, fungus, dirt & dust, bacteria and soot. Carbon-activated cabin air filters add an additional layer of protection, as they are coated in a layer of charcoal which reacts with harmful exhaust, ozone and odorous gases coming from the road, neutralising them before they enter the cabin.


When you’re shopping for a new cabin air filter, you can generally tell the difference between the two by looking at the product numbers of the filters you’re browsing through. When shopping through MANN cabin air filters, a regular filter will begin its part number with CU, whereas a carbon-activated filter will begin the product code with CUK. In a similar fashion, Ryco particle cabin filters will end their numbers with the letter P, whereas their carbon-activated filters will finish with the letter C.


Be sure to look out for the carbon activated cabin air filters, the extra few dollars will definitely prove themselves worth it.