The Kenworth W900 is a model line of conventional-cab trucks that are produced by the Kenworth division of PACCAR. The replacement of the 900-series conventional, the W900 is produced as a Class 8 conventional-cab truck primarily for highway use. The "W" in its model designation denotes Worthington, one of the two founders of Kenworth.[1]

At its introduction, the W900 conventional was introduced alongside the K100 COE. As the Kenworth model line was expanded, the W900 became its flagship conventional, with its cab structure used across other model families; the model line competed against a wide variety of model lines through its production. In line with the Peterbilt 379 (from PACCAR sister division Peterbilt), the W900 gained a following among owner-operator drivers. The model line also became a popular basis for truck customization, with owners adding additional chrome trim, wheels, lighting, and paint. Introduced in 2018, the Kenworth W990 was developed to complement the W900 line. The W900 is manufactured at Kenworth's main manufacturing facility in Renton, Washington.

Control:
AG-1:forward engine
AG-2:backward engine (brake first)
AG-3:primary light
AG-4:secondary light