4L0820857 Audi AIR DUCT

Basically, this part is a channel. It directs the refrigerant, which is the stuff that actually makes the cold air, to and from the AC compressor. It's not just an open pipe though; it's designed to withstand the high pressures and temperatures involved in the AC system. It also has specific bends and fittings to ensure the refrigerant flows correctly. Some have a receiver drier built in, which filters out moisture and debris. It's a critical link in the whole cooling loop. The compressor pressurizes the refrigerant, it flows through this duct to the condenser (where it cools down), then back to the evaporator (where it makes the cold air), and then back to the compressor. Everything is connected, so if this duct isn't working right, the whole system struggles. It basically acts like a highway for the refrigerant. If this duct fails, you’re looking at a complete loss of AC. You’ll notice if it’s leaking—you’ll probably see oil stains near the duct itself, and your AC will gradually stop blowing cold air. Even a small leak will diminish cooling performance. It can also put extra strain on the compressor, leading to a much more expensive repair down the line. We carry a pretty good selection of these at Fixparts Online, and getting a replacement is generally pretty straightforward. Replacing a damaged duct helps keep everything running efficiently and prevents bigger, more costly issues. What sets us apart: Air Duct (MPN 4L0820857) includes a 12-month warranty!

About Audi

Audi is a leading German automaker celebrated for crafting high-performance, luxury vehicles that combine advanced technology, elegant design, and exceptional driving experiences.

Why Choose Audi?

• Audi parts are made specifically for your vehicle, ensuring a perfect fit and reliable performance. • Using genuine Audi parts helps maintain your vehicle’s original quality and resale value. • Audi parts are rigorously tested to meet high safety and performance standards, giving you peace of mind. • We offer a wide range of Audi parts, so you can easily find what you need to keep your car running smoothly. Audi – trusted quality, available at FixParts Online!