What Does an Air Filter Do for a Car?

Turborevs features an in-depth guide about the functions of air filters.

An integral part of vehicle engines, air filters serve the purpose of cleaning out the air before it is fed into the intake manifold of the engine. Despite seeming like a non-essential accessory, these devices play an immense role in keeping the engine well-optimised and efficient.

Since most car owners tend to overlook this device, it is essential to shed light on its functioning. In this article, Turborevs features everything you need to know about the functioning of air filters and what they do for a car.

What is an Air Filter?

Starting off with the basics, all vehicle engines require an uninterrupted supply of air to function properly, as air is a main component in the combustion process. However, the same air can sometimes be riddled with a few impurities which can be detrimental to the engine’s health.

To ensure that the air being fed to the engine remains clean and fresh, air filters are employed, preventing dirt, grime, dust, and other pollutants from entering the engine. The filter comprises of a thin, porous sheet with several layers, with the purpose of obstructing large particles and other contaminants. 

What is the Purpose of an Air Filter?

Pollutants entering the engine compartment of your vehicle may not seem like a big deal, but the effects of such an event can be detrimental to your engine performance. If dirt or grime were to make their way into the engine compartment, the blockage would result in decreased air flow and a much slower combustion process.

Engines can also overheat and become inefficient if the air to fuel ratio is disturbed. Moreover, small grains and particles can potentially get stuck inside pistons and cylinders, causing severe damage to the internal body of the engine. Repairing these parts can also be quite a hassle, since it would require completely dismantling the engine. Air filters solve all these issues and offer an added benefit of improving fuel efficiency and engine performance.


Since air filters serve an important function in vehicles, it is essential to understand the workings and purpose of this device, especially for those that own a vehicle. However, simply understanding the workings is not enough as this device also requires strenuous maintenance as it can get clogged up quite easily. 

Find some of the best performance and tuning parts at Turborevs and take your driving experience to new heights.

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