This adapter basically connects the AC compressor to the AC lines—the hoses that carry the refrigerant. It's a coupling point. It doesn’t do anything actively like compress or cool, it just provides a secure connection. Sometimes it’s a straight connection, sometimes it changes the line size or angle. They come in a bunch of different designs depending on the vehicle and the compressor setup. Think of it as a critical link in the AC system. The compressor creates the pressure, the refrigerant flows through those lines, and this adapter makes sure that connection is solid. Without a good seal here, you’ll lose refrigerant, and the AC just won’t cool effectively. It sits right where the high – pressure line connects to the compressor body, so it’s exposed to a lot of stress and heat. Well, refrigerant is expensive and environmentally unfriendly, so a leak is a big deal. A failing adapter will cause that leak. Beyond that, if it fails completely, you’ll have no AC. You’ll notice if it starts to go because you might hear a hissing sound near the compressor, or your AC will start cooling less and less. They can corrode over time, especially with road salt, or the seals can dry out and crack. Honestly, it’s one of those parts that’s small and relatively inexpensive, but a real headache if it fails. We carry a lot of different ones at Fixparts Online, and it's usually best to replace it when you're doing other AC work, just to be safe. Versatile and reliable: Adapter (MPN 3C1820215) includes a 12-month warranty!

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• Audi parts are made specifically for your vehicle, ensuring a perfect fit and optimal performance. • Using genuine Audi parts helps maintain your vehicle's value and original quality. • Audi parts are rigorously tested to meet high safety and durability standards, giving you peace of mind. • You’ll get reliable performance and keep your Audi running like new with parts designed by the original manufacturer. Drive with confidence – choose Audi parts at FixParts Online.