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2026-08-08 · 3 min read

How Often to Replace the Engine Air Filter — and What Happens When It's Dirty

A clogged engine air filter chokes your engine of oxygen, reducing power and fuel economy. Find out the replacement interval and the symptoms of a dirty filter.

How Often to Replace the Engine Air Filter — and What Happens When It's Dirty

引擎空气滤芯(engine air filter)负责过滤进入引擎的空气,拦截灰尘、沙粒等杂质,保护引擎内部。和冷气滤网不同,引擎空气滤芯直接影响引擎性能和寿命。

多久换一次

一般建议每 15,000–30,000 KM 检查一次,视路况决定是否更换。马来西亚部分地区道路尘土多(建筑工地附近、泥路),换的周期要缩短。涡轮增压车引擎对进气质量更敏感,建议定期检查。

空气滤芯脏了有什么影响

进气量减少,燃油燃烧不完全,油耗上升 5–15%。加速时动力变弱,尤其涡轮车感觉更明显。严重堵塞时排气管可能冒黑烟。长期使用脏滤芯,细小杂质可能进入引擎造成磨损。

怎么判断该换了

取出空气滤芯(通常在引擎舱一个方形或圆形盒子里),对着光看——新的滤纸是白色或淡黄色,脏的是深灰或黑色,能明显看到灰尘积累。轻拍一下,大量灰尘掉出来就该换了。

原厂滤芯 vs 高流量滤芯

原厂纸质滤芯过滤效果好,价格实惠,适合大部分日常用车。高流量棉质滤芯(如 K&N)进气量更大,理论上小幅提升性能,但需要定期清洗保养,不适合懒得维护的车主。换保养时顺便检查空气滤芯,我们会告诉你是否需要更换。

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