Cascadia Mirror Arm Cover (2018–2026) – Driver Side Black – Replaces 22-78606-517

Restore the clean, finished look of your cab with this replacement Cascadia Mirror Arm Cover. Specifically designed for the "New Gen" Freightliner Cascadia P4 (model years 2018–2026), this driver-side (LH) component covers the structural arm of the side mirror assembly. Over time, these covers can crack from vibration, impacts, or weathering, exposing the internal wiring and mounting hardware to the elements. This durable replacement seals the arm structure, protecting critical electrical connections while maintaining the factory-standard aesthetic. This unit is a direct replacement for OEM 22-78606-517 and 563.46113.

Seamless Fit & Finish: The Cascadia Mirror Arm Cover Advantage

This Cascadia Mirror Arm Cover is molded from high-impact ABS plastic, engineered to resist fading, chalking, and cracking caused by UV exposure and extreme Midwest temperature shifts. The textured black finish perfectly matches the original equipment, ensuring a cohesive look with the rest of your mirror assembly. Note: Designed for easy maintenance, this cover snaps securely over the mirror arm, allowing for a quick "in-lot" repair without the need to remove the entire mirror assembly from the door. It’s a simple solution for keeping your fleet looking professional and well-maintained.

As we continue to build the largest inventory of commercial truck parts in Illinois, we prioritize affordable body parts that don't sacrifice quality. This Cascadia Mirror Arm Cover provides the precise fitment you expect from a dealership part at a price that fits the owner-operator budget. Replace your missing or broken arm cover today and keep your rig road-ready.