When should you replace your car's engine air filter?

This is a crucial component, so cleaning and replacing the air filter is essential to ensure the vehicle runs smoothly.

The function of an air filter in a car.

Engine air filter, combustion chamber

The engine air filter's main function is to filter air and prevent dust and dirt from entering the engine. After a period of use, dust particles will clog the air intake holes, causing the filter to become dirty. This reduces the airflow into the engine, leading to an imbalance in the fuel-to-air ratio.

Simultaneously, it reduces power output, causes engine overheating, and creates carbon deposits in the combustion chamber, affecting the ignition system. Furthermore, a torn or poor-quality air filter will allow dirt to pass through and accumulate on the intake air flow sensor. This reduces sensitivity, causing errors that lead to inaccurate fuel delivery and unstable engine operation.

Air filter for cabin air conditioning

Car air conditioning filters, also known as cabin air filters, are used to filter dust and dirt from the air, as well as some pollutants. Some higher-end filters also have the function of deodorizing or filtering impurities. This component provides convenience for the user.

However, after a period of use, the accumulated dirt and grime will significantly reduce the filtering efficiency and cause an unpleasant musty odor, affecting the health of the car owner.

How often should I replace my air filter?

Experts suggest that for new cars, the engine air filter should be cleaned every 5,000 km and replaced every 20,000 km.

For used vehicles, the air filter may need replacing sooner, depending on the vehicle's operating conditions. It can be cleaned every 3,000 km or once a month, and replaced every 15,000 km.

However, during the use of a car, if drivers notice the following signs, they should quickly check the car's air filter to see if it needs replacing.

- Engine overheats faster: If you notice your engine overheating more quickly than usual, the cause could be a damaged air filter, allowing dirt and debris to easily enter the engine and combustion chamber. This leads to engine overheating and a rapid decrease in performance.

- High fuel consumption: During vehicle use, continuously check how much fuel your car consumes. If, within the same timeframe and with the same travel schedule, your car consumes more fuel, this is a sign that the engine's air filter is clogged with dirt, making air filtration difficult, causing the engine to work harder and consume more fuel.

- Frequent engine stalling: A damaged or torn engine air filter can easily clog the filter's air vents, reducing airflow into the engine, causing carbon buildup that clogs spark plugs, and leading to sudden engine shutdowns.

How to replace and clean your car's air filter at home.

While replacing the engine air filter isn't overly complicated, it's advisable to take your car to a reputable garage for a thorough check-up.

If the driver wishes to perform the maintenance themselves at home, they should follow these steps:

Open the hood and wait for the engine to cool down completely.

Locate the exact position of the air filter housing.

Open the housing with the appropriate tool and remove the air filter from the housing.

Clean the air filter by gently tapping it against the floor to dislodge dust and debris. Then, use a vacuum cleaner or air blower to clean each layer of the filter, removing all the remaining dirt.

Never immerse the air filter in water, as this will damage it.

If the air filter is too dirty to clean, replace it with a new one, making sure to install it correctly into the housing.

Perform a final check by starting the engine, revving the throttle wide, and manually inspecting the intake manifold to ensure air is being drawn in, in case of blockage.