4H0885065 Audi GASFILSTRU

This filter isn't for gasoline itself, it’s for the fuel vapor emissions from your gas tank. Think of it like an air purifier, but for fumes. It’s made of a special material, usually activated charcoal, that traps those escaping gases. It's designed to keep fuel vapor from venting directly into the atmosphere. It's a key part of your vehicle’s evaporative emissions control system – often called the EVAP system. That system prevents harmful hydrocarbons from escaping. The filter sits inline between the tank and the charcoal canister, cleaning the air before it gets to the canister. The canister then stores the fumes temporarily until the engine can burn them off during normal operation. It's all about keeping things clean and legal, meeting emissions standards. A failing gas filter can cause a few issues. You might get a check engine light, and sometimes a “gas cap loose” type of message even if the cap is fine. It can affect fuel economy slightly, though that’s usually subtle. You’ll notice if it gets really bad, because you might smell fuel near the tank. It acts like a shield preventing those fumes from escaping and contributing to pollution. It’s also something that will cause your vehicle to fail an emissions test. You can usually find a replacement pretty easily; places like Fixparts Online have them in stock. It’s a relatively inexpensive part, and a good thing to keep in working order. Audi quality assured: Gas Filter (MPN 4H0885065) includes a 12-month warranty!

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