06M103271B Volkswagen RESTRICTOR

These little guys basically control fluid flow. Specifically, they regulate the amount of oil or coolant that goes to certain parts of the engine. They aren’t really about stopping flow, more about limiting it to a specific amount. They come in different sizes, usually measured by an orifice diameter, to allow for precise control. You’ll find them used in oiling systems, sometimes in coolant lines to the turbocharger, that sort of thing. Think of it as a precise valve, but smaller and generally a fixed size. It ensures that critical engine components get the right amount of lubrication or cooling. A common place you’ll see them is in controlling oil flow to variable valve timing systems. That system needs a certain, consistent amount of oil to function correctly. They’re a small part, but strategically placed. Without a properly functioning restrictor, you can end up with either too much or too little fluid going where it needs to go. Too little, and you risk damaging parts from friction or overheating. Too much, and you might overwhelm a system, leading to inefficiencies or even failure. You’ll notice if one fails usually through warning lights – low oil pressure is a big sign – or performance issues, like the engine running rough or losing power. They're often overlooked during maintenance, but a failing restrictor can cause bigger, more expensive problems down the road. You can find a good selection of these over at Fixparts Online if you’re looking to replace one. More than just a part: Restrictor (MPN 06M103271B) includes a 12-month warranty!

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