Air filters are a protective component within the interior of your vehicle, and near the engine. Air filters through the engine air filter, ensuring that dirt and debris don't get into your engine and cause damage. When the air filter gets clogged, you might notice performance issues with your vehicle.
A dirty air filter can make it harder for your engine to run, and it will cost you more in gas money when you don't invest in new air filters. Pay attention to changing your air filters on a regular basis, and aim to change your engine air filter about every 15,000 miles.
The interior air of your vehicle is protected by cabin air filters, and these need to be changed periodically. If you notice dust accumulating more rapidly, or there is a new odor in your vehicle, have the cabin air filters in your vehicle changed to see if this solves the issue.