Cheap, Simple Maintenance: Cabin Air Filter
Gross fact of the day: Unfiltered air inside a vehicle can be up to six times dirtier than the outside air.
Cabin air filters do exactly what they sound like they do. They filter the air *you* breath inside the car.
Think of them as your home air conditioning filter. You know the one. You make a note like 3x to go down to the hardware store. You finally get there and stand in the aisle debate how much money you want to spend on the darn things. It sits there for a couple days before you install it. Only to set an alarm on your phone so you can make another trip down there in x number of months to do the whole process over again.
Cabin air filters should be changed out once per year or every 12,000 miles or as needed depending on where you drive. Driving through a bunch of construction? Severe allergies this year? Your car could be making your symptoms worse.
Some filters even have antimicrobial technology designed to filter out pollutants, mold, mildew, soot, road dusty, fumes and allergens. They also can reduce odors from the exhaust systems of nearby vehicles.
Don't make your air conditioning system work harder than it needs to, have it inspected periodically and change it when necessary.