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Whats the difference between an air filter and a cabin air filter?

Air filters and cabin air filters are both important components in vehicles, but they serve different purposes. An air filter is responsible for cleaning the air that enters the engine, while a cabin air filter is responsible for cleaning the air that enters the vehicle's interior.


Air Filters


An air filter is a critical component of a vehicle's engine. It is responsible for removing dirt, dust, and other airborne particles from the air that enters the engine. This helps to protect the engine from wear and tear, and ensures that the engine is running efficiently. Air filters are typically located in the engine compartment, and they need to be replaced on a regular basis to maintain the vehicle's performance.


Cabin Air Filters


A cabin air filter, on the other hand, is responsible for cleaning the air that enters the vehicle's interior. This filter is designed to remove allergens, pollutants, and other airborne particles from the air that the driver and passengers breathe. Cabin air filters are typically located behind the glove compartment or in the HVAC system, and they also need to be replaced on a regular basis to maintain the vehicle's air quality.


Key Differences



  • Location: Air filters are located in the engine compartment, while cabin air filters are located in the HVAC system or behind the glove compartment.

  • Purpose: Air filters are designed to protect the engine, while cabin air filters are designed to improve the air quality inside the vehicle.

  • Replacement Schedule: Both air filters and cabin air filters need to be replaced on a regular basis, but the replacement schedule may vary depending on the vehicle and the driving conditions.


In summary, air filters and cabin air filters are both important components in vehicles, but they serve different purposes. Air filters are responsible for cleaning the air that enters the engine, while cabin air filters are responsible for cleaning the air that enters the vehicle's interior.

What are the signs of a bad cabin air filter?


How Do You Know When Your Cabin Air Filter Needs Replacement?

  • Musty or Moldy Smells in the Cabin.
  • Reduced Air Flow/Less Effective HVAC.
  • Foggy and Icy Windows Take Longer to Clear.
  • Noise Coming From the Air Vents.
  • Allergy and Breathing Problems While Driving.



Are air filters and cabin air filters the same?


A cabin air filter cleans the air that passes through the heating, ventilation, and air conditioning systems. An engine air filter keeps dirt, dust, sand, and other contaminants from getting inside the engine.



Does it matter what air filter you use for your car?


What type of air filter should I use? You should consider using a synthetic air filter for your car. Synthetic filters are more effective than traditional paper or cotton filters in terms of their ability to trap dirt, debris, and other contaminants that could lower the air quality of your vehicle.



How much does it cost to replace cabin filter and air filter?


If you take your vehicle to your dealer for service, they will likely replace the air cabin filter with a manufacturer-approved version that can run from around $40 to upwards of $100. If you replace the filter yourself, it can be as affordable as $18 to $28.



How do I know if I need a cabin or air filter?


How to check your cabin filter

  • The vehicle's heating or cooling starts making excessive noise.
  • You can hear a whistling sound coming from the cabin air intake ducts.
  • Airflow is weak, even when the heat or air conditioner is on high.
  • There is a musty odor coming through the air in your vehicle.



What happens if I don't replace my cabin air filter?


Cabin air filters help drastically reduce the amount of allergens that can get into your vehicle. Pollen could easily get into your vehicle without the cabin air filter, and the less often you change your filter, the more pollen that will build up, which could cause more of it to get into your vehicle.



Is it OK to drive without a cabin air filter?


Without a cabin air filter, the air inside your car can become laden with harmful pollutants. For those with respiratory problems or allergies, exposure to these contaminants can exacerbate their conditions. A functioning cabin air filter ensures you breathe cleaner air, making your drive more pleasant and healthy.



Which is more important, a cabin air filter or an engine air filter?


A dirty engine air filter can cause your engine to run poorly, and contaminants that pass by it can cause wear inside your engine. A bad cabin air filter usually won't cause damage, but it can prevent you from operating your car safely.



What happens if you never change your cabin filter?


Mold can build up on the filter if you don't change it, which can cause bad odors and smells. Mold is also extremely unhealthy to breathe in, as it can make a person very sick. But by replacing the cabin air filter regularly, you can avoid breathing in that unhealthy mold and keep your cabin smelling fresh.



Are there two air filters in a car?


Most cars have two air filters: an engine air filter and a cabin air filter. As the names suggest, your engine air filter cleans the air circulating your engine—protecting it from bugs, dirt, dust, and other potentially harmful contaminants.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.