Basically, a check valve lets fuel flow in one direction only. Think of it like a one – way street for gasoline. It opens up to allow fuel through, but once fuel tries to go backwards, it seals shut. It’s a pretty simple part, mechanically. You’ll find these mostly in the fuel system, specifically in things like fuel pumps or fuel rails. It’s there to maintain pressure and prevent fuel from flowing back into the tank when the engine's off, or from another part of the system when it shouldn't be there. It helps keep a consistent supply of fuel ready to go when you need it. Sometimes they’re used to keep vacuum from escaping in certain systems, too. If a check valve fails, you’ll notice if your engine is hard to start, or if it runs rough, especially when it's warm. Fuel might leak back, losing the pressure needed for proper fuel injection. That can cause all sorts of performance issues and even damage other parts over time. It acts like a shield, preventing issues downstream. They’re relatively inexpensive to replace, and honestly, it’s better to get it sorted out before it causes bigger problems. You can usually find a good replacement at places like Fixparts Online, or of course, at any auto parts store. We’ve got your back: Check Valve (MPN 7.20235.01.0) is covered for 12 months!

About Pierburg

Pierburg is a distinguished German brand specializing in emission control, air supply, and fuel systems for modern vehicles. Originating from Germany, Pierburg focuses on sustainable and efficient solutions to support advanced automotive technologies.

Why Choose Pierburg?

• Pierburg parts are known for lasting a long time, even in tough conditions. You won’t have to replace them constantly. • We make parts for a lot of different car brands, so there’s a good chance we have what you need. • Our parts help your car run efficiently, which can save you money on gas. • Pierburg has been making quality auto parts for over 100 years – we have the experience to get it right. Pierburg delivers excellence, FixParts Online delivers to your door.