Wabco 9518117640 Air Spring

Description

The Wabco 9518117640 is an Air Spring designed to provide a superior ride and improved handling for heavy-duty vehicles. It's used within the suspension system, specifically as an air bag within the strut and spring assembly. This air spring replaces a traditional steel spring, offering a more comfortable and controlled driving experience. Its robust construction and OE specification ensure reliable performance and longevity. The dimensions of this air spring are 253 x 255 x 319 mm, with a total length of 400.0 mm and a stroke of 358.0 mm. It features mounting points of 2x Female M10 x 1.5 and 1x Female M12 x 1.75, and a port thread of Female M22 x 1.5. It operates effectively within a temperature range of -40°C to +70°C and has a maximum operating pressure of 7.0 bar.

Key Features & Benefits

These basically replace the traditional steel coil springs in your vehicle’s suspension. Instead of metal, they’re these big, durable airbags. They fill with compressed air, and that’s what actually supports the weight of your vehicle. They can be adjusted – you can add or release air to change the ride height and stiffness. Some systems do this automatically, keeping the car level even when you're hauling a heavy load or have uneven weight distribution. Think of it like this – your springs and shocks are working together to absorb bumps and keep your tires on the ground. Air springs specifically handle supporting the weight. They work with your shocks – the shocks control the movement after the spring compresses, and the air spring handles a lot of the initial load. They're commonly found on trucks, vans, and some luxury cars, especially in the rear suspension. They give you a much smoother, more controlled ride, particularly when you’re carrying something heavy or towing.

Symptoms, Risks & Replacements

If an air spring fails, you’ll notice if it's a rear one pretty quickly – the vehicle will likely sit noticeably lower on that side. A front one is a little harder to spot at first, but you’ll feel a significant drop in ride quality and handling. It'll feel bumpy, unstable, and could even affect your steering. They’re important because a failing spring puts a ton of extra stress on other suspension parts like your shocks, and even potentially on your tires. They keep the vehicle level, comfortable, and most importantly, safe. If you're needing to replace one, you generally want to do both sides at the same time. You can often find these on sites like Fixparts Online, along with everything else you might need for the installation.

Warranty Information

Wabco Air Spring (MPN 9518117640) comes with a 1-year warranty.