The safest and most advanced truck we've ever built.
Introducing Detroit Assurance

Technology gets tough in the all-new 49X, the first Western Star to feature the most advanced suite of active safety systems ever offered to the vocational market — Detroit Assurance. But it not only helps keep people safe, it helps you reduce the repair and operational costs of having a truck out of service by avoiding collisions — which can mean game-changing productivity to you.

Side Guard Assist


A game changer for safety in and around busy jobsites, Side Guard Assist detects objects on the passenger side of the truck and alerts the operator.
Active Brake Assist

Active Brake Assist 5

Active Brake Assist 5 detects distance and speed to moving and stationary objects in its path and determines if braking is necessary. It's the only system on the market that works down to 5 MPH, making it ideal for travel in congested urban areas. It also recognizes pedestrians who are about to cross in the truck's path, alerting the operator while partially braking, followed by full braking if the operator does not react.
Adaptive Cruise Control to 0 MPH and Tailgate Warning

Adaptive Cruise Control to 0 MPH and Tailgate Warning

Detroit Assurance technology enables state-of-the-art features such as Adaptive Cruise Control to 0 MPH and Tailgate Warning to ease driving in stop and go traffic, as well as help mitigate front and rear collisions as operators travel from one jobsite to the next.

Find out more about

A windshield that makes it easy to see everything,
including an advantage in safety.
  • Field of Vision
    Delivers best-in-class field of vision thanks to a surface area that's 28% larger than our previous product offering, making it one of the largest windshields in its class.
  • Impact Resistant
    Impact-resistant option features improved material characteristics that better protect operators from rocks or other debris, and reduces downtime due to replacement.
  • One-Piece Design
    One-piece, roped-in design for easy removal and replacement in case of damage.
  • Heated Windshield
    Heated windshield option delivers heat throughout the windshield, speeds up defrost in icy/snowy conditions, as well as prevents refreeze and freezing up of the wipers for improved visibility.
  • Solar Film
    Optional solar film reduces heat in the cab, improving operator comfort.
  • Wider Wiper Zone
    24-inch wiper blades that cross over the center of the glass for a 37% improved wiper zone, giving operators a wider range of visibility and better unobstructed view.
dual stage Intelligent LED Headlights
  • Impact Resistance
    High-impact polycarbonate lenses with additional hard coating protection to prevent cracking, scratching or damage to the headlight from road or jobsite debris.
  • Heated Lens
    Dual Stage Intelligent heat grids to melt away ice and in humid environments, eliminate condensation, in minutes.
  • Integrated Amber DRL
    Integrated amber daytime running lights that double as turn signals, making the truck more visible to oncoming traffic and on the jobsite.
  • Wide Illumination
    LED output is designed to fully illuminate the road and jobsite, including off to the sides of the vehicle, to reduce eye fatigue while letting operators detect objects sooner.