The Wabco 8930402404 Sleeve Insert is a critical component within air brake systems, designed to connect and seal air lines. It's used in various air brake fittings to ensure reliable and leak-free operation. This sleeve insert is manufactured to OE specification, guaranteeing a precise fit and consistent performance. Measuring 15 x 12 x 12 mm, it provides a secure connection for tube diameters of 12 mm and 9 mm, contributing to the overall safety and efficiency of the braking system. These little guys are basically connectors. They slide inside air brake fittings – things like where your air lines connect to the air dryer, or the brake chambers. They create a tight, leak – proof seal between the airline and the fitting itself. They handle the pressurized air, so they need to be solid. Think of your air brake system like your circulatory system – everything needs to be sealed and working right for it to function. These inserts are a critical part of those connections. They ensure the air pressure goes where it needs to go – to your brakes – and doesn't escape. They fit inside the fitting to grab onto the air line and create that seal. Without them, you’ll get leaks, and that’s a big problem. Air brakes rely on consistent pressure. A leak, even a small one, can significantly reduce braking power and that’s obviously dangerous. These sleeve inserts act like a shield against those leaks. You’ll notice if one fails, usually as a slow or fast leak when applying the brakes, or a hissing sound. It's a cheap part to replace compared to the cost of fixing a brake failure. You can find them pretty easily—we stock a lot of them at Fixparts Online, and other auto parts places should too. Best to replace them any time you’re working with the air lines, just as a preventative measure. Proven track record: Sleeve Insert (MPN 8930402404) is backed by 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. Wabco delivers excellence, FixParts Online delivers to your door.