This little valve basically controls the flow of air between different parts of your intake system. Specifically, it manages the switching between a primary air pathway and an auxiliary one. It’s all about getting the right amount of air into the engine at different times, depending on how much power you’re asking for. It opens and closes based on engine vacuum – how hard the engine is working, essentially. It’s a pretty simple mechanical operation, but it has a big effect. It's a part of your intake manifold system, so it's right there managing air delivery to the engine. It’s most noticeable at idle and during acceleration. The primary pathway handles most of the air all the time, but when you need more power – accelerating hard, for example – the valve opens up the auxiliary pathway to let more air in. Think of it like an extra lane opening up on a highway when traffic gets heavy. It works with other components like the air control valve and the EGR system to make sure everything runs smoothly. If this valve fails, you'll notice if your engine is idling rough, maybe even stalling. You might get a check engine light, and it could affect your fuel economy. It really impacts how responsive your engine is. If it's stuck open, the engine might run lean, and if it’s stuck closed, it might run rich. Either way, it's not good long term. It acts like a shield protecting the engine from inconsistent air flow. A failing one can cause a cascade of other issues, so it's best to replace it when it starts acting up. You can find a replacement pretty easily – a lot of folks get them from places like Fixparts Online, but any good auto parts store should have one. It's a relatively inexpensive part, and can save you a lot of headaches down the road. Pierburg stands behind its products: Switchover Valve (MPN 7.22402.03.0) has a 12-month warranty!

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 and working reliably, saving you money on repairs down the road. • We make parts for many popular car brands, so there's a good chance we have what you need. • Pierburg parts meet or exceed original equipment standards, meaning they perform as well as the parts your car came with. • We’re a trusted name in the auto parts industry with a history of innovation and quality. Pierburg – trusted quality, available at FixParts Online!