Wabco 9518147300 Air Spring

Description

The Wabco 9518147300 is an Air Spring designed for use in truck and trailer suspension systems. This air bellow provides a comfortable and controlled ride by absorbing road impacts and maintaining vehicle height. It's a direct replacement OE specification part with dimensions of 290 x 340 x 290 mm. With a stroke of 390.0 mm and a maximum operating pressure of 21.0 bar, this air spring offers enhanced durability and consistent performance across a wide temperature range, from -55°C to +70°C. Its mounting features include 2x Male M12 x 1.75 and 4x Female M12 x 1.75 connections, with a Port thread 1 of Female M22 x 1.5.

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 9518147300) comes with a 1-year warranty.