WHAT TO KNOW ABOUT YOUR CAR’S AIR FILTERS

|
02/23/2021
Air Filter
Contents

Committing to changing the air filters on your vehicle on a regular basis can prolong engine life, maximize engine power, help the planet, and improve your health.

There are two types of air filters in every car. One filter cleans the air that enters the engine, and another filters the air you breathe inside the vehicle. Both filters are made of paper, cotton, or foam and trap dust, pollen, mold, and debris, preventing it from getting in the engine or in the air you breathe. The experts at Milex Complete Auto Care recommend changing the air filters on your car to keep it performing at the top of its game. Learning how to check your air filters and understanding why keeping them clean is important are key to your health and the well-being of your vehicle.

How to Tell if Your Engine Air Filter Needs Changing

Your car’s engine requires sufficient airflow to run properly. A clogged air filter can create build up on your spark plugs, which can cause the car or idle roughly. Small particles from the air can cause damage to various parts of your engine. Having a clean air filter can prevent costly repairs to your engine.

Mechanics used to recommend changing air filters frequently to maintain fuel economy. A study from the U.S. Department of Energy revealed a car’s air filter does not improve fuel efficiency on new, fuel-injected engines, according to the American Automobile Association. While older carburetor cars needed fresh air filters, present guidance recommends changing the air filter only if airflow is badly restricted, or as directed by the automaker.

Most automakers recommend changing the filter every 30,000 miles. Checking the condition of your air filter is an easy task.

  1. Open your car’s hood and find the plastic box with a large hose sticking out of the side on top or the side of your engine.
  2. You may need a screwdriver, but the engine air filter housing will likely be closed with clamps. Pop open the box and remove the filter and see if it is full of debris. If you tap the filter and dirt falls out, it’s time to replace it.

Signs Your Cabin Air Filter Needs Replacing

The cabin air filter is responsible for keeping the air in your car fresh and clean. The World Health Organization estimates that around 7 million people die from exposure to polluted air every year, and nine out of 10 people breathe polluted air. One of the leading causes of air pollution is truck and car emissions on the roadway. While the United States has taken great strides to reduce air pollution with regulations and emissions testing, making sure your cabin air filter is in proper working order can help protect your health on the road. Pollutants are often higher inside your vehicle, especially if you are idling in traffic. In fact, the air inside your car can be up to 15 times more polluted than the air outside, reveals IQAir, an air-quality resource. If you live in a smoggy city, or a desert climate, you may need to change your air filter more frequently, Car and Driver reports. In addition to keeping out pollutants, the cabin air filter helps keep out dust, dirt, pollen, bugs, and leaves. Pollen is especially problematic for people who are prone to allergies. No one wants their eyes to water, or have a sneezing fit, while they’re concentrating on the road.

Milex Complete Auto Care recommends changing your cabin air filter every 30,000 miles, or when you notice a sign it may be dirty. Here are the top signs your cabin air filter needs replacing.

  • Your car smells musty or unpleasant.
  • Weak airflow from your heat or air conditioning unit or it is louder than normal.
  • A whistling sound coming from vents or you see debris.
  • Your allergies are acting up.
  • Your windshield takes a long time to defog.

If you are driving in a big city with a lot of trucks emitting harmful emissions, you can minimize the impact and keep out pollutants by driving with your windows closed and using the recirculation setting on your car’s ventilation system, according to Occupational Health & Safety magazine. You can spot-check your cabin air filter easily. Cabin air filters are typically located under the dash or behind the glove box. A quick look at your owner’s manual will tell you where to find your filter. If it looks filthy, it’s time to get a new one.

Keep your engine and your lungs healthy by visiting an expert at Milex Complete Auto Care to make sure your car’s air filters are in top form.

Contents

Let's Talk

Single Post Form

A contact us form.

Name
Address

related blogs

10/06/2026
Why Does My Car Hesitate When I Put It in Drive or Reverse?

You shift your vehicle into Drive or Reverse, but instead of moving right away, there’s a noticeable pause. Maybe the engine revs slightly before the vehicle begins moving, or you feel a sudden jolt when the gear finally engages. If this sounds familiar, your vehicle may be experiencing delayed transmission engagement. A brief hesitation may […]

Read More
09/01/2026
Transmission Fluid Leak: What Does It Look Like and What Should You Do?

Finding a puddle or stain underneath your vehicle can be concerning, especially when you’re not sure where it came from. While vehicles use several different fluids, a leak from the transmission is one you shouldn’t ignore. Transmission fluid plays an important role in keeping your transmission operating properly. Depending on the type of transmission, it […]

Read More
08/01/2026
Signs Your Transmission Needs Attention Before the School Year Starts

As summer winds down and the back-to-school season begins, many families find themselves spending more time on the road. Whether you're driving children to school, commuting to work, shuttling students to extracurricular activities, or sending a college student back to campus, your vehicle is about to see an increase in daily use. Before your schedule […]

Read More
07/01/2026
How Modern Transmissions Have Changed Over the Last 10 Years

Vehicle technology has advanced rapidly over the past decade, and one of the most significant changes has occurred in a component many drivers rarely think about until there's a problem—the transmission. Modern transmissions are more sophisticated, efficient, and technologically advanced than ever before. While these innovations help improve fuel economy, performance, and driving comfort, they […]

Read More
06/01/2026
How Road Trips Can Reveal Hidden Transmission Problems

Summer road trips are one of the best parts of the season. Whether you’re planning a beach getaway, visiting family, or taking a long summer road trip, your vehicle will likely spend extended time on the road. At Mr. Transmission, we often see drivers experience transmission trouble during or shortly after a long trip because […]

Read More
05/01/2026
How Hot Weather Affects Your Transmission

As temperatures rise, most drivers think about keeping their engine cool—but your transmission is just as vulnerable to heat, especially during the summer months. In fact, excessive heat is one of the leading causes of transmission damage. Understanding how hot weather impacts your vehicle can help you avoid costly repairs and keep your car running […]

Read More
04/15/2026
Transmission Repair: Why Choose Mr. Transmission Over a Dealership

When your vehicle starts showing signs of transmission trouble, one of the first decisions you’ll face is where to take it for service. While dealerships may seem like the default choice, many drivers are discovering that specialized shops like Mr. Transmission offer a better overall experience—especially when it comes to standards, transparency, and warranty protection. […]

Read More
04/01/2026
High Mileage Vehicle Maintenance: Transmission Tips to Keep Your Car Running Strong

If your vehicle has crossed the 100,000-mile mark, you’re not alone. In fact, at Mr. Transmission, the average mileage we see is around 128,000 miles—and counting. Thanks to improved vehicle engineering, it’s more common than ever for cars to stay on the road well beyond 150,000 miles. But with higher mileage comes a greater need […]

Read More
03/02/2026
Mr. Transmission: Your Local Experts in CVT Transmission Repair for Nissan and Honda

Continuously Variable Transmissions (CVTs) have become increasingly common in today’s vehicles—especially in popular brands like Nissan and Honda. While CVTs offer smoother acceleration and improved fuel efficiency, they also require specialized knowledge and care when problems arise. At Mr. Transmission, we are the experts in CVT transmission repair, maintenance, and replacement. If you drive a […]

Read More
02/01/2026
Love Your Car Back: How Transmission Maintenance Saves You Money

February is often associated with showing a little extra love—and while flowers and chocolates are nice, there’s another relationship that deserves attention: the one you have with your car. Your vehicle works hard for you every day, and one of the most important ways to return the favor is through transmission care. At Mr. Transmission, […]

Read More
1 2 3 … 23
linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram