A fuel filter’s purpose is to trap any large particles to prevent them from going into the engine. As a general rule, I recommend changing this filter regularly, or every 15,000 – 20,000 miles.
The air filter’s function is to filter air coming into the engine. It will help run cleaner air into the engine. I recommend replacing this at least once/year (or sooner if it becomes dirty or clogged).
Cabin air filter
Most people haven’t heard of this filter. It filters and traps dust, pollen, bacteria, and exhaust gases that may find a way into your vehicle’s ventilation system. This filter helps make the air in the interior of your car a healthier place. I would recommend changing this filter once/year or more often if you or family members suffer from allergies and dust.