Why do I need to regularly change the air filter in my Ford S-Max?

I've heard that it's important to regularly change the air filter in my Ford S-Max, but I'm not sure why. Can you explain the function of the air filter and how often it should be replaced in order to maintain optimal performance of my car?

The air filter plays an important role in ensuring that your Ford S-Max's engine receives clean air for combustion. Over time, it can become clogged with dirt and debris, reducing its effectiveness and potentially causing damage to your engine. It is recommended to replace your air filter every 10,000-15,000 miles or once a year.

A dirty air filter can result in reduced fuel efficiency and power, leading to a decrease in overall performance of your Ford S-Max. Regularly changing the air filter can help maintain the health of your engine and save you money on gas in the long run.

Not changing your air filter can also lead to increased emissions and potentially cause your engine to fail emissions tests. So not only will regularly replacing your air filter keep your car running smoothly, but it also helps reduce your environmental impact.