This piston is a critical component within Wabco's air brake systems, specifically designed for use in relay valves. It facilitates the smooth and reliable operation of the braking mechanism, ensuring optimal performance and safety. Manufactured by Wabco with MPN 9730016204, this piston adheres to OE specifications for dependable performance. Its dimensions are 25 x 83 x 81 mm, allowing for a precise fit and consistent functionality. This component's robust design and meticulous manufacturing contribute to enhanced durability and a longer service life for the air brake system. This little guy basically takes the air pressure coming from your system and translates it into mechanical movement. It slides back and forth inside the valve body, opening and closing ports. Think of it like a gatekeeper controlling the flow of air to your brake chambers. It’s what actually does the work of applying and releasing the brakes when you hit the pedal or the automatic systems kick in. It handles the pressure, and that movement is what tells the brakes what to do. It’s a critical component of your air brake system, naturally. The relay valve itself is what amplifies the signal from your brake pedal or automatic controls to the brake chambers at each wheel. The piston inside the relay valve is the part that makes that amplification happen. Without it functioning correctly, the signal gets lost, and your brakes won’t respond reliably. It lives inside the relay valve, so it’s not something you’ll see directly when inspecting the whole brake system. It’s important because, well, brakes are important, right? A worn or damaged piston means inconsistent braking. You'll notice if it's bad—you might get longer stopping distances, or feel a spongy brake pedal. It acts like a shield, protecting the valve body itself from wear, but it is a wear item. Over time, the seals can degrade, or the piston can get scored. If it fails completely, you could lose braking power on that axle. You can find these pistons at places like Fixparts Online, and it's something you want to address quickly if you suspect it's failing, because it directly impacts safety. Smart choice: Piston (MPN 9730016204) is backed by a 12-month warranty!

About Wabco

WABCO is a global innovator in braking, stability, and suspension systems for commercial vehicles, enhancing safety and efficiency.

Why Choose Wabco?

• Wabco parts are built to last, meaning fewer repairs and more time on the road. • We offer a wide range of parts for many different vehicles – chances are we have what you need. • Our parts meet or exceed industry standards, giving you reliable performance you can trust. • Wabco has a long history of serving professionals and DIYers alike with quality auto parts and excellent customer support. Drive with confidence – choose Wabco parts at FixParts Online.