The question of how many cabin filters in the car, often puzzles not only beginners, but also experienced motorists, accustomed to the standard maintenance scheme. At first glance, the answer seems to be unambiguous – one element located behind the glove compartment, which changes once a year. However, modern climate control and ventilation systems have become much more complex, and automotive engineers are implementing multi-level filtration to ensure maximum comfort.

In fact, the number of filter elements can vary from one to three or more, depending on the make, model and year of your vehicle. Air purification system In premium and modern cars, it is often divided into several zones or cleaning steps, which requires the installation of additional cartridges. Understanding this design is critical to maintaining the health of the driver and passengers, as well as the proper operation of the entire air conditioning system.

In this article, we will look in detail at where to look for hidden filters, how they differ from each other, and why ignoring the replacement of one of them can negate the effectiveness of the entire system. You'll know how it works. multi-level filtration in modern cars and what nuances should be paid attention to when buying consumables.

Basic configuration: one or two?

The vast majority of mass-market cars produced over the past 15 years have a basic system with one main one. cabin-filter. It is usually located behind a duffle box (dressbox) on the front passenger side. This element is responsible for the primary cleaning of incoming air from the street from dust, down, insects and large dirt. Its replacement is a mandatory procedure of routine maintenance.

However, in many models, especially those with dual-zone or four-zone climate control, the design may involve two symmetrical filters. They are placed side by side or above each other in one seat. This is done to increase the filtration area and reduce airflow resistance, which is especially important for powerful ventilation systems. If you have taken out one filter, and there is still a place in the niche or a second end is visible, be sure to remove and check its condition.

Some manufacturers, such as BMW or Mercedes-BenzIn certain models, combined systems can be used, where air intake is carried out through two different holes on different sides of the engine compartment. In such cases, the physical number of filters is really two, and you need to change both, even if one looks cleaner than the other. Ignoring the second element will cause half of the incoming air to be untreated.

⚠️ Warning: When buying filters, always check the number of pieces in the package. Some manufacturers sell sets of two pieces for one machine, while others sell one. Installing only one filter from the pair will disrupt the balancing of air flows in the system.

The configuration differences often depend on the type of engine and configuration. Basic versions of cars can have one slot, while climate versions require two. When ordering spare parts, always use them. VIN code To determine exactly how many elements are designed specifically for your modification.

Multilevel cleaning system in modern cars

With the development of environmental standards and the increasing demands on cabin air quality, manufacturers have begun to implement complex multi-stage systems. Now the question of how many filters can concern not only the number of identical elements, but also different types of cleaners working in a bundle. In such systems, air passes through several barriers before entering the cabin.

The first barrier is often the so-called rough cleaning filter or "mosquito net", which is installed directly on the air intake under the windshield or in the toad. This element traps large debris, leaves and water, protecting the main filter from rapid contamination. Although technically a filter, it is changed much less often, usually every second or third of the main element.

The second and most important step is the basic cabin filter, which we discussed earlier. Third level in expensive cars (e.g. with type systems) HEPA or Bioweapon Defense Mode) additional fine cleaning modules may act. They can be integrated into the main unit or go as a separate insert. These systems are capable of trapping tiny particles of PM2.5, viruses and bacteria.

Technology of the future

What is PM2.5?

The HEPA filters and PM2.5-labeled systems are capable of trapping particles smaller than 2.5 microns. For comparison, the thickness of a human hair is about 50-70 microns. Such filters often have an additional layer of silver ions or high-density activated carbon to neutralize odors and bacteria.

end-->

In vehicles with an air recirculation system, additional carbon filters may be installed in the indoor air intake channels. This creates a situation where the machine formally has two or three different types of filter elements, each performing a unique function. Replacing only one of them will not give the full cleaning effect.

Where to look for additional filters?

If you are used to changing the filter only behind the glove compartment, you may be missing other important elements. The location of additional filters depends on the engineering solutions of the specific manufacturer. Let’s look at the main places where the “second” filters are hidden, which are often forgotten.

The most common place for the second element or prefilter is the zone. toad (plastic grille at the base of the windshield). Removing the decorative patch of wipers, you can find a plastic box with a grid or felt element. This filter protects not only the cabin, but also prevents debris from entering the heating system, which could then rot and create an unpleasant smell.

In some models, for example, individual versions Volkswagen or AudiThere may be a separate filtration system for the left and right sides of the torpedo. In such cases, access to the second filter may be difficult and require partial dismantling of the elements of the center console or removal of the glove box completely.

☑️ Finding all filters in your car

Completed.

0 / 4