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Kenworth W900B/W900L Tool & Battery Boxes

Secure your gear and protect your batteries with Kenworth W900B and W900L toolboxes and battery boxes. Find full-frame mounted step boxes in in 30, 40, and 45-inch lengths.
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  • CSM Diamond Plate Aluminum Battery Box Cover- 40 Inch For Kenworth T800, W900B, W900L

    CSM Diamond Plate Aluminum Battery Box Cover- 40 Inch For Kenworth T800, W900B, W900L

    CHROME SHOP MAFIA

    $262.99
    40 Inch Diamond Plate Aluminum Battery Box Cover By Chrome Shop Mafia Fits KenworthUpgrade your Kenworth T800, W900B, or W900L with the 40-inch CSM Diamond Plate Aluminum Battery Box Cover by Chrome...
    02-0501224
    SKU:
    02-0501224
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Product Type:
    Toolboxes
    Ready To Ship:
    Yes
    $262.99
    Qty in Cart: 0
    Price:
    $262.99
    Subtotal:
  • Stainless Steel Tool Box Cover W/ Built In Step- 45 Inch- Passenger Side For Kenworth W900

    Stainless Steel Tool Box Cover W/ Built In Step- 45 Inch- Passenger Side For Kenworth W900

    ARANDA TRUCK ACCESSORIES

    $744.99
    Passenger Side 45 Inch SS Tool Box Cover With Built In Step Fits KenworthProtect the passenger side tool box of your Kenworth W900 with this 45-inch Stainless Steel Toolbox Cover featuring a built-in...
    02-0501222
    SKU:
    02-0501222
    Position:
    Passenger Side
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Kenworth
    Product Type:
    Toolboxes
    $744.99
    Qty in Cart: 0
    Price:
    $744.99
    Subtotal:
  • Stainless Steel Battery Box Cover W/ Built In Step- 45 Inch- Driver Side For Kenworth W900

    Stainless Steel Battery Box Cover W/ Built In Step- 45 Inch- Driver Side For Kenworth W900

    ARANDA TRUCK ACCESSORIES

    $659.99
    Driver Side 45 Inch SS Battery Box Cover With Built In Step Fits KenworthProtect your Kenworth W900 driver side battery with this 45-inch Stainless Steel Battery Box Cover featuring a built-in step...
    02-0501221
    SKU:
    02-0501221
    Position:
    Driver Side
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Kenworth
    Product Type:
    Toolboxes
    $659.99
    Qty in Cart: 0
    Price:
    $659.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Wing Nut For Battery Box Replaces HWC02418, D84002418 For Kenworth T800 & W900

    Wing Nut For Battery Box Replaces HWC02418, D84002418 For Kenworth T800 & W900

    OPP - ORIGINAL PARTS PROGRAM

    $24.06
    Wing Nut For Battery Box Fits KenworthEnsure secure and reliable battery box installation on your Kenworth T800 or W900 with this high-quality wing nut. Engineered for durability and ease of use,...
    02-0501209
    SKU:
    02-0501209
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Product Type:
    Toolboxes
    $24.06
    Qty in Cart: 0
    Price:
    $24.06
    Subtotal:
  • FREE SHIPPING OVER $249
    Black Poly Battery Box Washer W/ Steel Insert Replaces K366-474 For Kenworth - 2 Pack

    Black Poly Battery Box Washer W/ Steel Insert Replaces K366-474 For Kenworth - 2 Pack

    ENERGY SUSPENSION

    $16.31
    2 Pack Energy Suspension Battery Box Washers Fits Kenworth Replaces K366-474The Black Poly Battery Box Washer W/ Steel Insert is a durable replacement designed for Kenworth K366-474 applications...
    02-0501208
    SKU:
    02-0501208
    Color:
    Black
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Plastic/Poly
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $16.31
    Qty in Cart: 0
    Price:
    $16.31
    Subtotal:
  • CSM 45 Inch Diamond Plate Battery Box Cover For Kenworth W900B & W900L 2005-Newer

    CSM 45 Inch Diamond Plate Battery Box Cover For Kenworth W900B & W900L 2005-Newer

    CHROME SHOP MAFIA

    $318.99
    Battery Box Fits Kenworth W-900B & W900L 2005-Newer By Chrome Shop Mafia* High Quality Battery Box Cover* Made Of Aluminum* Diamond Plate Finish* Cover Only, Fits 45 Inch Battery Boxes* Replacement...
    02-0501207
    SKU:
    02-0501207
    Length Options:
    45 Inch
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Aluminum
    Make:
    Kenworth
    Finish Options:
    Diamond Plate
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $318.99
    Qty in Cart: 0
    Price:
    $318.99
    Subtotal:
  • BESTfit 45 Inch Diamond Plate Battery Box Cover For Kenworth W900B & W900L 2004-Older By BestFit

    BESTfit 45 Inch Diamond Plate Battery Box Cover For Kenworth W900B & W900L 2004-Older By BestFit

    BESTFIT TRUCK PARTS

    $277.99
    BESTfit Battery Box Cover - 45 Inch Diamond Plate Aluminum Fits Kenworth W900B & W900L 2004-Older4 State Trucks offers this Economy Battery Cover to fit Kenworth W900B & L models. It is constructed...
    02-0501203
    SKU:
    02-0501203
    Length Options:
    45 Inch
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Kenworth
    Finish Options:
    Diamond Plate
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $277.99
    Qty in Cart: 0
    Price:
    $277.99
    Subtotal:
  • Roadworks Stainless Steel Retro Tool Box- 45 Inch For Kenworth W900B, W900L

    Roadworks Stainless Steel Retro Tool Box- 45 Inch For Kenworth W900B, W900L

    ROADWORKS

    $1,813.99
    45 Inch SS Retro Tool Box By Roadworks Fits KenworthMaximize storage and stability on your Kenworth W900B or W900L with the Roadworks 45-inch Stainless Steel Retro Tool Box. Crafted from premium...
    02-0501007
    SKU:
    02-0501007
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Kenworth
    Product Type:
    Toolboxes
    $1,813.99
    Qty in Cart: 0
    Price:
    $1,813.99
    Subtotal:
  • Roadworks Stainless Steel Battery Box- 45 Inch For Kenworth W900B, W900L

    Roadworks Stainless Steel Battery Box- 45 Inch For Kenworth W900B, W900L

    ROADWORKS

    $1,599.99
    45 Inch SS Battery Box By Roadworks Fits KenworthProtect and organize your Kenworth W900B or W900L with the 45-inch Roadworks Stainless Steel Battery Box. Featuring a new ACE-style one-piece design,...
    02-0501006
    SKU:
    02-0501006
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Kenworth
    Product Type:
    Toolboxes
    $1,599.99
    Qty in Cart: 0
    Price:
    $1,599.99
    Subtotal:
  • BESTfit Battery Box 45 Inch W/ Diamond Plate Cover, Lower Step & No Mounting Hardware For Kenworth W900B, W900L 2004-Older

    BESTfit Battery Box 45 Inch W/ Diamond Plate Cover, Lower Step & No Mounting Hardware For Kenworth W900B, W900L 2004-Older

    BESTFIT TRUCK PARTS

    $544.99
    Battery Box 45 Inch W/ Diamond Plate Cover, Lower Step & No Mounting Hardware By BESTfit Fits Kenworth W900B, W900L 2004-OlderProtect your batteries with this aftermarket battery box with a diamond...
    02-0501002
    SKU:
    02-0501002
    Truck Class:
    Heavy Duty
    Length Options:
    45 Inch
    Material Options:
    Aluminum
    Make:
    Kenworth
    Finish Options:
    Diamond Plate
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $544.99
    Qty in Cart: 0
    Price:
    $544.99
    Subtotal:
  • Stainless Steel Tool Box End Plates For Kenworth T600, T800, W900

    Stainless Steel Tool Box End Plates For Kenworth T600, T800, W900

    PHOENIX DESIGN

    $147.99
    Stainless Steel Tool Box End Plates Fit Kenworth T600, T800 & W900* High Quality Tool Box End Plate* Made Of 304 Stainless Steel* Sold As Pair * Warranty On Tool Box End Plate Against Defects In...
    02-050100007
    SKU:
    02-050100007
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $147.99
    Qty in Cart: 0
    Price:
    $147.99
    Subtotal:
  • Stainless Steel Tool Box Cover W/ Latch Hole- 45 Inch For Kenworth T600, T800, W900

    Stainless Steel Tool Box Cover W/ Latch Hole- 45 Inch For Kenworth T600, T800, W900

    PHOENIX DESIGN

    $68.99
    45 Inch SS Tool Box Cover With Latch Hole Fits KenworthAdd style and protection to your Kenworth T600, T800, or W900 tool box with the 45-inch Stainless Steel Cover featuring a latch hole...
    02-050100006
    SKU:
    02-050100006
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Make:
    Kenworth
    Product Type:
    Toolboxes
    Ready To Ship:
    Yes
    $68.99
    Qty in Cart: 0
    Price:
    $68.99
    Subtotal:
  • Stainless Steel Tool Box Cover W/ Latch Hole- 39 Inch For Kenworth T600, T800, W900

    Stainless Steel Tool Box Cover W/ Latch Hole- 39 Inch For Kenworth T600, T800, W900

    PHOENIX DESIGN

    $73.99
    39 Inch SS Tool Box Cover With Latch Hole Fits KenworthEnhance the protection and appearance of your Kenworth T600, T800, or W900 tool box with the 39-inch Stainless Steel Cover featuring a...
    02-050100005
    SKU:
    02-050100005
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Kenworth
    Product Type:
    Toolboxes
    Ready To Ship:
    Yes
    $73.99
    Qty in Cart: 0
    Price:
    $73.99
    Subtotal:
  • Stainless Steel Battery Box Cover- 45 Inch For Kenworth T600, T800, W900

    Stainless Steel Battery Box Cover- 45 Inch For Kenworth T600, T800, W900

    PHOENIX DESIGN

    $67.99
    45 Inch SS Battery Box Cover Fits KenworthProtect and style your Kenworth T600, T800, or W900 battery with the 45-inch Stainless Steel Battery Box Cover. Constructed from 304 stainless steel, it...
    02-050100004
    SKU:
    02-050100004
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Kenworth
    Product Type:
    Toolboxes
    $67.99
    Qty in Cart: 0
    Price:
    $67.99
    Subtotal:
  • Stainless Steel Battery Box Cover- 39 Inch For Kenworth T600, T800, W900

    Stainless Steel Battery Box Cover- 39 Inch For Kenworth T600, T800, W900

    PHOENIX DESIGN

    $60.99
    39 Inch SS Battery Box Cover Fits KenworthEnsure your Kenworth T600, T800, or W900 battery stays protected with this 39-inch Stainless Steel Battery Box Cover. Constructed from high-quality 304...
    02-050100003
    SKU:
    02-050100003
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Make:
    Kenworth
    Product Type:
    Toolboxes
    $60.99
    Qty in Cart: 0
    Price:
    $60.99
    Subtotal:
  • Roadworks Stainless Steel Retro Advanced Cab Entry Battery Box- 40 Inch For Kenworth W900B, W900L

    Roadworks Stainless Steel Retro Advanced Cab Entry Battery Box- 40 Inch For Kenworth W900B, W900L

    ROADWORKS

    $1,740.99
    40 Inch SS Retro Advanced Cab Entry Battery Box By Roadworks Fits KenworthProtect and upgrade your Kenworth W900B or W900L battery setup with the Roadworks Stainless Steel Retro A.C.E. Battery Box...
    02-050100002
    SKU:
    02-050100002
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Make:
    Kenworth
    Product Type:
    Toolboxes
    $1,740.99
    Qty in Cart: 0
    Price:
    $1,740.99
    Subtotal:
  • Stainless Steel Step Bracket- 9 Inch For Kenworth W900A, W900B, W900L

    Stainless Steel Step Bracket- 9 Inch For Kenworth W900A, W900B, W900L

    ARANDA TRUCK ACCESSORIES

    $237.99
    9 Inch SS Step Bracket Fits Kenworth* High Quality Step Bracket * Made Of 11 Gauge Stainless Steel * 9 Inches Wide * Able To Be Used As Battery Or Tool Box Step Bracket * Sold As Pair * Warranty On...
    02-050100001
    SKU:
    02-050100001
    Width Options:
    9 Inch
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Kenworth
    Product Type:
    Frame & Chassis
    $237.99
    Qty in Cart: 0
    Price:
    $237.99
    Subtotal:
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Adding your products to cart

Replacement Kenworth W900 Battery Box Steps

Safety is critical when climbing into your cab. If your factory steps are cracked or slippery, upgrade to a new Kenworth W900 battery box step. We offer direct-replacement lower step panels that bolt right onto your existing battery or tool box assembly. Material Options: Choose from lightweight aluminum diamond plate for maximum grip or mirror-polished stainless steel for a show-truck finish. Enhanced Traction: Our steps feature aggressive punch-out tread patterns and deep grooves to stop boots from slipping in mud, snow, or rain. Direct Fit: Designed to replace OEM steps on 40-inch and 45-inch boxes commonly found on W900L and W900B models.

Heavy-Duty Kenworth Step Boxes

Maximize your frame rail space with our selection of Kenworth step boxes. These "saddle boxes" combine the utility of a heavy-duty tool chest with the functionality of a frame step. Versatile Storage: Perfect for storing chains, binders, fluids, and batteries while keeping your deck plate clear. Sizes for Every Rig: Available in widths ranging from 12 inches to 36 inches to fit tight frame spaces. Durability: Constructed from .125-inch thick marine-grade aluminum with weather-sealed locking T-handles to keep your equipment dry and secure.

Precision Fitment & Hard-to-Find Parts

From standard W900L AeroCab setups to vocational rig configurations, we have the sizes you need. We stock standard 30-inch, 40-inch, and 45-inch assemblies complete with lids and mounting hardware. Are you searching for a specific or older configuration, such as a Kenworth 2900 battery box style or a specific 29-inch custom size? Our parts team can help you identify the correct dimensions and mounting brackets to ensure a seamless installation on your truck frame.

Frequently Asked Questions About Kenworth W900B/W900L Tool & Battery Boxes

Will these tool and battery boxes fit my Kenworth W900B or W900L without modification?

Most boxes in this category are designed to match the mounting points and frame dimensions of the W900B and W900L models, but exact fitment can vary depending on the model year and any custom frame modifications your truck may have. We recommend checking the listed specifications and measurements for each product and comparing them to your truck before purchasing. If you are unsure, our customer service team can help confirm fitment based on your truck's details.

What materials are these boxes made from, and how do they hold up over time?

Tool and battery boxes in this category are commonly available in aluminum and steel construction, often with a diamond plate or smooth finish. Aluminum boxes tend to resist corrosion better and are lighter, while steel boxes typically offer added durability for heavier-duty use. Look at each product listing for specifics on gauge thickness and finish, since these details affect long-term performance and appearance.

How do I install a tool or battery box on my truck?

Installation typically involves mounting the box to your frame rails using brackets, bolts, or existing mounting holes, depending on the box design. Some boxes are built as direct bolt-on replacements, while others may require drilling or fabrication of mounting brackets. Always refer to the manufacturer's installation instructions included with the product, and if you are not confident in DIY installation, a professional truck shop can ensure it is mounted securely.

Can these boxes handle exposure to road salt, moisture, and daily wear?

Boxes made from aluminum generally offer better resistance to rust and corrosion compared to untreated steel, making them a solid choice for trucks that run in wet or salted road conditions. Steel boxes with a powder-coated or otherwise treated finish can also hold up well, but may require more maintenance over time to prevent surface rust, especially if the coating gets scratched or chipped.

Do these boxes come with locks, and are they secure enough to protect tools and batteries?

Many tool and battery boxes include integrated locking mechanisms or are designed to accept aftermarket locks for added security. Check the individual product description to confirm whether a lock is included or sold separately. If security is a top priority, consider a box with a lockable lid or paddle latch design to help protect your tools and batteries from theft.


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