Why get them checked: You may be familiar with what happens when a home’s furnace filter is dirty and how the restricted airflow affects the furnace’s ability to properly heat the entire house. Your car’s engine faces a similar struggle when it has a dirty air filter. You might not think to check the filter when your car seems to be running fine, but a clogged air filter can affect your acceleration. A dirty cabin air filter won’t be effective at cleaning the air that you breathe while driving which could impact your allergies. Both filters should be a part of your routine car maintenance.