Freightliner Cascadia Cab Air Bag - 2018-2026+ Air Spring - 1S5-175

Restore the legendary ride quality of your rig with this premium Freightliner Cascadia Cab Air Bag by FleetPro Parts & Tires. Specifically engineered for 2018 and newer Freightliner Cascadia and compatible Western Star trucks, this air spring is a critical component of your cabin's suspension system. In the high-vibration world of long-haul trucking, a worn or leaking cabin air spring can lead to a punishing ride, increased interior noise, and unnecessary wear on your cab’s mounting points. We stock these heavily right here in our Hanover Park, Illinois warehouse to ensure lightning-fast shipping for fleets across the country.

Industrial-Grade Comfort: The Freightliner Cascadia Cab Air Bag Advantage

This Freightliner Cascadia Cab Air Bag is constructed from high-tensile, ozone-resistant rubber to prevent dry rotting and cracking—a common issue in the fluctuating temperatures of the Midwest. By maintaining a consistent air cushion, it isolates the driver and the sleeper compartment from chassis vibration, significantly reducing driver fatigue during those 11-hour shifts. Note: This air spring features a precision-molded top and bottom plate to ensure a leak-free seal and an exact OEM fit, meaning no modifications are required for installation. This is the go-to choice for owner-operators looking to maintain "factory-fresh" cab stability.

As we continue to build the largest inventory of commercial truck parts in Illinois, we prioritize suspension hardware that balances durability with industrial performance. This heavy-duty replacement has been pressure-tested to meet or exceed OEM specifications, ensuring it can handle the weight and torque of modern Class 8 cabs. Whether you are traversing rough construction sites in a Western Star or cruising the interstate in a Freightliner, this air bag provides the necessary dampening for a professional, comfortable ride.

Vehicle Fitment & Compatibility

This heavy-duty cabin air spring is precision-engineered for the following applications:

• Make: Freightliner & Western Star
• Freightliner Models: Cascadia (New Body Style / P4)
• Years: 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 and newer
• Position: Rear Cab Suspension / Sleeper Shock

Direct Replacement & Cross-Reference Numbers:

This cab air bag serves as a direct exact-fit replacement for the following part numbers:

• OEM & Aftermarket Interchange: 1S5-175, 67638, 660033406

Technical Specifications

• Material: High-Tensile Ozone-Resistant Rubber
• Mounting: Precision-Molded Top & Bottom Plates included
• Function: Cab/Sleeper Vibration Dampening
• Installation: Direct Factory Bolt-On
• Brand: FleetPro Parts & Tires