This cap, it’s pretty straightforward. It seals off a specific opening, usually in a fuel system component like a fuel rail or a fuel tank sending unit. Basically, it prevents fuel vapor or even liquid fuel from escaping. Sometimes it’s also there to keep dirt and debris out. It's a simple part, but vital for everything working right. Think of it as a stopper on a bottle. It’s part of the overall fuel delivery system. Fuel needs to be contained and routed correctly to the engine. This cap is one small piece of that puzzle, ensuring everything stays sealed up tight. It’s not something that makes the engine run, but if it fails, it messes up the whole process. It’s important because even a small fuel leak creates a fire hazard, plain and simple. Fuel vapor is flammable, and you don't want that around a hot engine. Beyond safety, leaks also mess with your fuel efficiency and can even cause the engine to run poorly. You’ll notice if it's gone bad usually by a fuel smell, or potentially a check engine light coming on if the system detects a pressure issue. We carry a lot of these at Fixparts Online, and getting a new one is usually a cheap and easy fix to prevent bigger problems down the road. It’s a small part doing a big job, so it’s worth taking care of. Your assurance of quality: Cap (MPN 028130229A) comes with a 12-month warranty!

About Volkswagen

Volkswagen blends German engineering and innovation to produce a versatile lineup of vehicles.

Why Choose Volkswagen?

• Get parts made specifically for your VW, ensuring a perfect fit and reliable performance. • Volkswagen parts are quality-tested to meet high standards, so you can drive with confidence. • Using genuine VW parts helps maintain your vehicle’s value. • We have a wide selection of parts, from everyday maintenance items to more complex components. Volkswagen delivers excellence, FixParts Online delivers to your door.