1Q0906311 Audi AIRCLEANER

Basically, it cleans the air that goes into your engine. It filters out dust, dirt, pollen, bugs – everything the engine sucks in to burn with fuel. It's a simple part, a paper or sometimes fabric filter inside a plastic frame. It’s designed to catch all that nasty stuff before it gets into the more sensitive parts of your engine. Think of it as the first line of defense. Air comes in, hits this filter, and only clean air gets through to mix with fuel and create combustion. It sits right in the air intake system, usually in a plastic housing. It’s pretty easy to spot under the hood, generally. Modern engines use mass airflow sensors, and the air filter is positioned upstream of that sensor to protect it, too. A dirty air filter really impacts performance. It restricts airflow, so your engine has to work harder to pull in the air it needs. That can reduce gas mileage and even decrease engine power. You’ll notice if it's really clogged, especially when accelerating; the engine might feel sluggish. More importantly, letting a super dirty filter stay in there is like letting all that dirt and grit into the engine itself, and that causes wear and tear on vital components. They don’t last as long if they’re constantly being bombarded with particles. It’s a cheap part to replace, and it’s a key part of keeping your engine running smoothly for a long time. You can find them pretty easily – Fixparts Online has a good selection, and most auto parts stores do too. Regular replacement is the key – check your owner’s manual for the recommended interval, usually based on mileage or time. Backed by experts: Air Cleaner (MPN 1Q0906311) includes a 12-month warranty!

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