You can determine whether the air filter is dirty by observing the engine's operating condition and checking the surface color of the air filter. Below are the relevant details: Methods to identify a dirty air filter: Check the engine's operating condition. If the air filter is dirty, the air intake will be insufficient, leading to incomplete fuel combustion, which causes unstable engine operation. When continuously pressing the accelerator pedal, the engine sound may become muffled, acceleration response sluggish, operation weak, and exhaust thick and black. After cleaning the dust off the air filter surface, if the inner and outer surfaces of the filter return to their original color when blowing dust from the inside out with compressed air, the filter can still be used. However, if both surfaces appear gray-black, it indicates dust particles have penetrated the filter paper, and a new filter should be replaced. Filters that are aged, deteriorated, washed with water or oil, or have poor sealing should be replaced promptly. Air filter replacement interval: This depends on the vehicle's usage and surrounding environment. Under normal driving conditions, the air filter should be replaced every 15,000 kilometers. If frequently driving in poor environments, the replacement interval should be shortened appropriately, not exceeding 10,000 kilometers. Owners should develop the habit of regular inspections and timely maintenance.
