Western Star 5700XE Deck Plate-Air Box

Frequently Asked Questions About Western Star 5700XE Deck Plate-Air Box

What is the deck plate/air box on a Western Star 5700XE, and what does it do?

The deck plate and air box assembly is the component mounted behind the cab on the frame deck that houses and protects the air lines and electrical connections running between the tractor and trailer. It keeps the glad hands, air fittings, and wiring organized, secured, and shielded from road debris and weather while providing a clean mounting point for these connections.

Will this deck plate/air box fit my Western Star 5700XE?

Deck plate and air box assemblies are typically built to match a specific frame width, cab configuration, and air line/electrical routing setup, so fitment can vary by model year and how the truck was originally equipped. Before ordering, compare your existing unit's mounting hole pattern and dimensions against the listing, and check the fitment notes provided on each product page. If you are unsure, contacting our parts specialists with your VIN or truck specs is the best way to confirm a correct match.

What materials and finishes are these deck plates/air boxes available in?

These components are commonly available in steel or aluminum construction, with finish options that may include raw/unfinished, painted, or powder-coated surfaces depending on the specific product. Steel offers durability for heavy-duty use, while aluminum options can help reduce weight and resist corrosion. Check each listing for the specific material and finish details.

How difficult is it to install a replacement deck plate or air box?

Installation generally involves unbolting the damaged or worn unit from the frame deck, disconnecting and transferring the air lines and electrical connectors, and bolting the new assembly into place using the existing mounting holes. Most installations can be handled with common hand tools by someone comfortable with basic truck maintenance, though the complexity can increase if air lines or wiring need to be rerouted or replaced along with the deck plate.

Why would I need to replace my deck plate or air box, and what should I look for when buying a replacement?

Common reasons for replacement include road debris damage, rust or corrosion, cracked mounting brackets, or worn-out fittings that no longer hold air lines securely. When shopping for a replacement, look for a unit that matches your truck's mounting configuration, is constructed from durable material suited to your operating environment, and includes any necessary brackets or hardware so the air lines and electrical connections can be properly secured once installed.