These hoses circulate hot engine coolant to your heater core. The heater core is basically a small radiator inside your dashboard. Coolant goes in, and the blower fan blows air across it, giving you warm air for defrosting or just staying comfortable inside the car. It’s a closed loop system – coolant goes from the engine, through the heater core, and then back to the engine to get reheated. Think of it as part of your car’s climate control system. It's not directly involved in making the engine run, but it's essential for comfort and visibility, especially in colder weather. It's a fairly simple part, honestly, but a vital one. Usually there's an upper and a lower hose, connecting the engine to the heater core. Well, if it fails, you'll quickly notice. You’ll suddenly lose heat inside the car, and you might even see coolant leaking. That leaking can cause overheating, and nobody wants that. These hoses are rubber, so they get brittle and crack over time from the heat and pressure of the coolant. It’s a relatively inexpensive part to replace, and doing it proactively can save you from a much bigger problem down the road. It’s one of those things that’s easy to put off, but really smart to check during regular maintenance. You can find a good selection of these, including the right one for your car, over at Fixparts Online. Expert assistance included: Hose (MPN 8W1819372A) has a 12-month warranty!

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• 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. Drive with confidence – choose Audi parts at FixParts Online.