This thing is basically the heart of your air brake system. It does a few key jobs. First, it filters the air coming into the system, gets rid of dirt and moisture. Then, it regulates the air pressure, making sure everything gets the right amount. It also includes a safety valve which releases air if the pressure gets too high. Think of it like a little air management center. It’s positioned right where the air comes into the brake system, usually near the air compressor. From there, that clean, regulated air goes out to all the air brakes – the service brakes you use to stop, the trailer brakes if you're towing, and any auxiliary things that run on air. It’s a central point, everything relies on it being good. Honestly, this is one of those parts you really don't want to mess around with. If it fails, you can lose braking power, plain and simple. The filter keeps contaminants out which would damage other expensive parts over time. The regulator makes sure your brakes apply smoothly and reliably. And that safety valve? That acts like a shield, preventing the system from being over – pressurized and potentially failing catastrophically. You’ll notice if it’s going bad – things like longer brake engagement times, inconsistent brake feel, or even an air brake warning light coming on. If you're seeing any of that, it’s time to check it out. You can find a good replacement unit at places like Fixparts Online, or of course we can order one for you here. One size fits all: Air Processing Unit (MPN 9325000800) has 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 known for lasting a long time, saving you money on repairs in the long run. • We have a huge selection of parts, so you’re likely to find exactly what you need for your vehicle. • Our parts meet or exceed industry standards, giving you peace of mind on the road. • Wabco has been a trusted name in auto parts for decades, with a reputation for quality and reliability. Wabco – trusted quality, available at FixParts Online!