How often should the cabin air filter and engine air filter be replaced?

[VonNatalie]

The replacement interval specified in the vehicle maintenance manual indicates that the engine air filter should generally be replaced every 20,000 to 60,000 kilometers. If the driving mileage is relatively low, it is recommended to replace it every 12 months. The cabin air filter should be replaced approximately every 10,000 kilometers. If it is not replaced for a long time, it will affect the performance of the air conditioning system and the health of the vehicle occupants. Cabin Air Filter: The cabin air filter is a crucial component in the vehicle's air conditioning system. Its primary function is to filter out bacteria, PM2.5 particles, moisture, pollen, dust, and other contaminants from the air. It is recommended to inspect both the engine air filter and cabin air filter during every maintenance service. The engine air filter's location varies depending on the intake design and engine structure, but it is typically housed in the air cleaner attached to the engine's intake pipe. The cabin air filter is usually installed beneath or inside the glove compartment on the passenger side, though some models place it below the windshield in front of the passenger seat. Function of Cabin Air Filter: It absorbs fine particles, reduces respiratory discomfort, minimizes irritation for allergy sufferers, and protects the air conditioning cooling system. Without the cabin air filter, these particles would enter the cabin, contaminating the air conditioning system, reducing cooling efficiency, and potentially causing allergic reactions, lung damage, or irritation from ozone exposure, all of which could compromise driving safety. Dirty Cabin Air Filter: A clogged cabin air filter can restrict airflow, impair cooling performance, increase fuel consumption, and generate noise, ultimately shortening the air conditioning system's lifespan. Accumulated contaminants on the filter can breed bacteria and mold, posing health risks to passengers and potentially leading to illnesses. Engine Air Filter: Also known as an air filter cartridge or air cleaner, this component is essential in vehicles, agricultural machinery, laboratories, sterile environments, and precision operation rooms. Function of Engine Air Filter: It filters airborne particles, ensuring the engine cylinders receive sufficient clean air while preventing dust from entering the engine, which could accelerate wear on piston assemblies and cylinders. Dirty Engine Air Filter: Using an excessively dirty engine air filter can restrict airflow, causing incomplete fuel combustion, unstable engine operation, reduced power, and increased fuel consumption. Therefore, maintaining a clean engine air filter or replacing it promptly is crucial.

[LucyMarie]

I've been driving for over 20 years and found that the cabin air filter should ideally be replaced annually, especially before summer, as it filters the air inside the car to prevent dust and bacteria from entering, ensuring fresh breathing. If you frequently encounter traffic jams or heavy air pollution, it might need replacement every 8,000 kilometers. As for the engine air filter, I usually replace it every 20,000 kilometers, mainly to protect the engine from excessive dust intake, preventing increased fuel consumption and reduced power. Forgetting to replace it can lead to a musty smell from the car's air conditioning, dizziness while driving, and long-term health impacts, not to mention wasted fuel money. Make it a habit to check the maintenance record booklet every six months, and be more diligent in harsh environments—saving money and ensuring peace of mind.

[GeorgeRose]

As a car enthusiast who has done several modifications, I believe the cabin air filter generally needs replacement every 12 months, while the engine air filter should be changed every 15,000 km. For performance vehicles, upgrading to a high-flow filter can extend the interval to 20,000 km, but frequent city commuting in dusty conditions may clog the air ducts, reducing airflow and slowing cooling, necessitating shorter replacement cycles. Neglecting cabin air filter changes leads to pollen buildup causing allergies, and aged engine air filters increase carbon deposits and fuel consumption. Adjust based on road conditions: in sandy/dusty areas, visually inspect for contamination every 8,000 km and replace promptly to maintain optimal power delivery and comfort.

[Alfie]

To control expenses, I've researched several money-saving methods. The cabin air filter is inexpensive and usually replaced annually, allowing DIY to save on labor costs; the engine air filter should be changed every 20,000 km or two years to avoid costly repairs. Focus on driving conditions: frequent short city trips warrant earlier replacement for peace of mind, while less highway driving permits delays. Inspection is simple: remove the filter—replace if discolored or odorous. Neglect causes poor AC airflow/slow cooling, and a dirty engine air filter increases fuel consumption by over 0.5 liters. Tracking mileage for scheduled maintenance proves highly cost-effective.