This diaphragm, manufactured by Wabco with MPN 8971321684, is a critical component within air dryer systems used in air brake systems. It functions to regulate air pressure and ensure consistent brake performance in heavy-duty vehicles. This diaphragm is sized 73 x 5 x 68 mm and meets OE specifications, ensuring a precise fit and reliable operation. Its robust construction and adherence to original equipment standards contribute to extended service life and consistent brake system functionality. This little rubber piece—it looks kinda like a flexible disc—basically regulates the air pressure within the air dryer. It moves back and forth, opening and closing valves inside the dryer. This movement controls how much air gets through and helps remove moisture, oil, and other nasty stuff from the compressed air system. It's a key part of keeping everything running smoothly. Think of your air brake system as needing really clean, dry air to work right. This diaphragm is right at the front line of that process. It's inside the air dryer, which is sort of like the lungs of the system. It’s what breathes in the compressed air, filters it, and then sends clean air onwards to your brakes, suspension, and other air – powered components. It’s not directly in the brakes themselves, but it’s vital to the whole process. Well, moisture and contaminants in your air lines can cause all sorts of trouble. Corrosion, frozen lines in winter, and reduced braking performance are just a few. This diaphragm helps prevent all that. If it fails, you’ll likely notice reduced brake performance, longer stopping distances, or even the air brake warning light coming on. It acts like a shield, protecting the rest of the air system from damage. They do wear out over time, especially with road grime and temperature swings. You can often find replacements like this one at places like Fixparts Online, and it's generally a pretty straightforward repair, but it's important to get it done if you suspect it's failing. Ignoring it can lead to bigger, and more expensive, problems down the road. Wabco quality assured: Diaphragm (MPN 8971321684) includes a 12-month warranty!

About Wabco

WABCO specializes in air braking systems, EBS, ABS, ADAS, and trailer control systems.

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.