How many cabin air filters are in a car?

Most cars have one cabin air filter, though some models may have two. The cabin air filter is responsible for cleaning the air that enters the vehicle's interior, removing dust, pollen, and other airborne particles before they reach the passenger compartment.

Understanding Cabin Air Filters

Cabin air filters are an important component of a car's HVAC (Heating, Ventilation, and Air Conditioning) system. They are typically located behind the glove box or in the engine compartment, and their primary function is to improve the air quality inside the vehicle. By trapping contaminants, cabin air filters help reduce the amount of dust, pollen, and other allergens that can enter the car, making the ride more comfortable and healthier for passengers.

Single vs. Dual Cabin Air Filters

The majority of vehicles on the road today have a single cabin air filter. However, some higher-end or more advanced models may be equipped with two cabin air filters, one for the driver's side and one for the passenger's side. This dual-filter setup provides even more effective filtration, ensuring that the air entering the cabin is thoroughly cleaned.

Replacing Cabin Air Filters

• Cabin air filters should be replaced periodically, typically every 12-24 months or as recommended by the vehicle manufacturer.


• Replacing the cabin air filter is a relatively simple maintenance task that can be done at home or by a professional mechanic.


• Neglecting to replace the cabin air filter can lead to reduced HVAC system performance, decreased fuel efficiency, and a buildup of contaminants in the vehicle's interior.

Maintaining the cabin air filter is an important part of keeping your car's HVAC system running efficiently and ensuring a clean, comfortable environment for you and your passengers.

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

The cost to replace a cabin air filter typically ranges from $30 to $70 for a professional service, with the price varying based on the vehicle's make, model, and the accessibility of the filter. Replacing the filter yourself can significantly lower the cost, as a new filter can be purchased for as little as $6 to $12, and the labor is minimal to non-existent. 
This video explains the cost of engine and cabin air filter replacement: 43sPartsHawkYouTube · Sep 8, 2023
Professional replacement

• Average cost: Expect to pay anywhere from $40 to $130 at a dealership or local mechanic, although many sources suggest a more common range of $30 to $70 for both parts and labor. 
• Factors influencing cost:
  • Vehicle make and model: Some vehicles, especially foreign or luxury brands, may have higher-priced filters or filters in harder-to-reach locations, which can increase labor time. 
  • Type of filter: Premium filters with enhanced features like activated carbon will cost more. 
  • Service center: Dealerships often charge more than independent mechanics or chains. 

This video demonstrates how to replace a cabin air filter and discusses the associated costs: 1mCounty Office PropertyYouTube · Nov 20, 2024
DIY replacement

• Average cost: A new cabin air filter typically costs between $6 and $40, depending on the brand and features.
• Labor cost: $0$ 0$0.
• How to do it: Many vehicles have an accessible cabin air filter behind the glove box, and the replacement can often be done without any tools by simply pinching tabs or removing a few screws. Numerous online videos demonstrate the specific process for different car models. 

This video provides a step-by-step guide on how to replace a cabin air filter: 55sTom the DilettanteYouTube · Dec 22, 2023
How to save money

• DIY: Replacing the filter yourself is the most effective way to save on labor costs. 
• Compare prices: Shop around at auto parts stores, online retailers, and dealerships to find the best price for the filter itself.
• Check for specials: Some service centers offer discounts on routine maintenance like cabin air filter replacement. 

Do cars have two cabin air filters?

They have two air filters, one for engine air and one for the cabin, and a host of other filters to protect your engine and transmission. It can get confusing because not all cars have the same filters, and each filter likely has its own service intervals.

What happens if you don't change cabin air filter?

If you don't change your cabin air filter, it will become clogged with debris, leading to reduced airflow from your vents, poor air quality inside the vehicle, and potential damage to the HVAC system. This can cause musty odors, foggy windows, and force the blower motor to work harder, shortening its lifespan and leading to expensive repairs. 
This video shows how to change a cabin air filter and the difference between a new and a dirty one: 1mManiZillaYouTube · Jan 25, 2021
Consequences of a clogged cabin air filter:

• Reduced airflow: A clogged filter restricts the amount of air that can pass through, resulting in weaker heat and AC performance. 
• Poor air quality: The filter's ability to trap dust, pollen, and other pollutants is diminished, leading to lower air quality inside the cabin and potential respiratory or allergy issues for occupants. 
• Unpleasant odors: A dirty, moisture-laden filter can develop mold and mildew, creating musty or foul smells from the vents. 
• Window fogging: A lack of proper airflow can cause windows to fog up more easily, impairing visibility. 
• Damage to the blower motor: The HVAC system must work harder to push air through a clogged filter, which can cause the blower motor to overheat and fail prematurely, notes Filterbuy.com and Berkeley Bob's. 
• Minor decrease in fuel efficiency: The engine may have to work slightly harder to power the strained HVAC system, leading to a small decrease in fuel efficiency, according to AutoZone.com. 

This video explains the relationship between a dirty cabin air filter and the HVAC system: 57sUnder The Hood ShowYouTube · Jun 23, 2021

How many filters are in my car?

There are generally four types of car filters — oil, transmission, fuel, and air. However, some drivers find this confusing because there are two different air filters in most vehicles. Below, we'll explain more about how each type of filter works (and why you likely have two rather than one air filter).