Mopar puts the cabin air filter at roughly 15,000 to 20,000 miles, and around 6,000 to 10,000 for dusty, rural or off road driving. Where it sits behind your glove box, the symptoms owners misread as a failing blower, and why one harvest can fill a filter that would last a city driver two years. From a Portage la Prairie Ram and Jeep dealer.
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