Air Filter Engine vs. Cabin Air Filter in Cars: What’s the Difference?

JAKARTA, JANUARY 2026, Clean air has indeed been proven to be healthy. Both the air that Daihatsu friends breathe and the air consumed by the engine while operating. That is why all car engines require air filters that aim to filter out dirt or small particles in the air that will be inhaled. Thus, the combustion system in the engine is much more perfect.

Therefore, vehicles are required to use filters, whether for the combustion system in the engine or the air passing through the HVAC system (Heating, Ventilation, and Air Conditioning). An integrated system that functions to control the temperature, humidity, and air quality in the cabin or engine room to remain comfortable during use.

Although they may look very similar at first glance, there are actually differences between the two. So what are the functions of these filters, and when comparing cabin filters with air filters, what are the other differences? Here’s what Daihatsu friends need to know.

Differences Between Cabin Air Filter and Engine Air Filter

The main similarity between cabin air filters and engine air filters is their purpose. Both are designed to protect the vehicle from dust, dirt, pollen, and harmful contaminants that can enter through the air intake system. Here are the details of each difference:

1. Installation Location

The main difference between these two types of filters lies in their location within the car. Engine air filters can be found near the front of the vehicle or under the hood. Meanwhile, cabin air filters are usually found inside the passenger compartment, generally behind the glove box, under the passenger side dashboard, or in the area near the firewall.

2. Size Dimension Differences

Another difference between these two filters is their size. Engine air filters are generally larger because the volume of air that needs to be filtered is much higher. Meanwhile, cabin air filters often have additional layers, such as activated carbon, to filter out odors, light gases, and micro-particles like pollen and allergens.

On the other hand, cabin air filters tend to be much smaller and their design is simpler because they need to be neatly installed in tight spaces in the dashboard. Although smaller, cabin air filters are often designed to filter out smaller particles like pollen and other allergens. Additionally, cabin air filters generally contain odor-neutralizing carbon in their layers.

3. Filter Replacement

One more difference is that engine air filters can often be cleaned or replaced relatively easily in the engine compartment. Meanwhile, cabin air filters sometimes require professional replacement due to their location, for example, behind the cabin's luggage compartment.

When Should Air Filters Be Replaced?

For engine air filters, the recommended replacement time is ideally every 10,000–20,000 km or 6–12 months. This will ensure that clean air sufficiently passes through the vehicle's engine to prevent performance decline due to restricted airflow. It is also important to check the filter regularly and replace it if it appears dirty or damaged.

Meanwhile, cabin air filters usually require replacement less frequently, or depending on the climate and driving conditions. This filter helps keep the passenger space free from pollutants by filtering out contaminants, unpleasant odors, or undesirable aromas.