The Western Star X-Series has been purpose-built to take on the toughest jobs Australia has to offer. Whether you’re pulling road trains across the Nullarbor, managing metro distribution, or hauling heavy construction loads, the 47X, 48X and 49X offer a flexible, fit-for-purpose solution backed by Penske’s nationwide support network.
With cutting-edge safety tech, a powerful integrated driveline, and a durable chassis that’s lighter yet stronger, the X-Series is more than just an upgrade—it’s a reimagining of what a Western Star can be.
Here’s your complete summary of what each model in the X-Series lineup brings to the table.
Meet the Family – Three Models, Endless Possibilities
47X – Versatility First
- Axle Configs: 6×4, 8×4*, 10×4*
- Engines:
- Cummins L9: 330–380 hp, 1,050–1,250 lb-ft
- Detroit DD13 Gen 5: 450–525 hp, 1,550–1,850 lb-ft
- BBC (Bumper to Back of Cab): 2,835 mm
- Cab Options: Day cab, 36″ sleeper, 48″ sleeper
Designed for applications that require agility and payload flexibility. The short, sloped bonnet and set-back axle make it ideal for tipper, agitator, and metro work.
48X – The Linehaul Leader
- Axle Configs: 6×4
- Engines:
- Detroit DD13 Gen 5 or DD16
- Power output: 450–600 hp, up to 2,050 lb-ft
- BBC: 2,865 mm
- Cab Options: Day cab, 36″, 48″, 60″ sleepers
This model is the sweet spot for B-double and linehaul work—offering a balance of performance, comfort, and configurability. The set-forward axle suits high-GCM applications, with up to 130-tonne GCM, subject to engineering.
49X – King of Capability
- Axle Configs: 6×4
- Engines: Detroit DD16 only (500–600 hp, 1,850–2,050 lb-ft)
- BBC: 3,085 mm
- Cab Options: All the way up to the 72″ Stratosphere high-roof sleeper
With up to 200+ tonne GCM, the 49X is ideal for road trains, mining, and extreme heavy haulage. If you want a truck to live in and lean on, this is it.
Powertrains – Driveline That Delivers
Across the range, you’ll find the proven performance of Detroit and Cummins engines, supported by transmission choices to match your operation:
- Automated Manual:
- Detroit DT12-OV and DT12-OVX (up to 2,500 lb-ft)
- Manual:
- Eaton Fuller RTLO (1,650 to 2,250 lb-ft)
- Automatic:
- Allison (up to 1,850 lb-ft – 47X only)
Every option is PTO-ready, with rear and side PTOs available for body builders.
Chassis and Suspension – Strength Without Compromise
- Frame Rail Options: Single-channel 9.5 mm, 13 mm, 15 mm; up to 5.6 million inch-lbs RBM with reinforcement
- Frame Heights: 265 mm or 285 mm
- Front Axles: Meritor & Detroit (6.6–9.0 t GAWR)
- Rear Axles: Meritor & Dana (up to 23.6 t GAWR)
- Suspensions:
- AirLiner, TufTrac Gen2, Neway, Hendrickson Primaax EX and Ultimaax
Splayed rails at the front improve service access and allow better engine packaging, while crossmembers and fasteners are built for strength and ease of service.
Cab Comfort – The New Standard in Driver Ergonomics
Western Star didn’t just update the cab—they reengineered it:
- Steel-reinforced aluminium cab for safety and weight savings
- Triple-sealed doors to reduce noise, dust and fatigue
- Quiet Steel engine tunnel for NVH control
- Wraparound dash with up to 13 analogue gauges + digital display
- Digital Dash Option: 300 mm instrument cluster, 250 mm infotainment screen with Apple CarPlay® and Android Auto®
Sleeper configurations include:
- 36″, 48″, 60″, and 72″ Stratosphere high roof
- Premium double bunk options
- Dinette/worktable in the 72” with microwave, fridge and ambient lighting
Safety and Tech – Smarter Trucks, Safer Drivers
All X-Series models with DT12 transmissions include the Detroit Assurance safety suite:
- Active Brake Assist 5 – full auto braking down to 8 km/h
- Adaptive Cruise Control with Stop & Go
- Side Guard Assist
- Lane Departure Warning
- Tailgate Warning
- Brake Hold Function
- Electronic Stability Control
- Intelligent High Beams
- Auto Wipers and Headlights
Pair this with Detroit Connect and Virtual Technician, and fleets gain real-time fault alerts, diagnostics, and preventative maintenance data—all from the office.
Body Builder Ready – Fast Fit, Smart Spec
Western Star’s QuickFit™ system makes upfitting seamless:
- Dash-mounted auxiliary switches
- Dedicated body builder interface with programmable logic
- E-vaults for power access and controller housing
- Quick dash access for wiring installation
Support That Goes the Distance
Backed by Penske Australia, the X-Series is supported by:
- 60+ service locations across ANZ
- 24/7 STAR Assist roadside support (2 years from in-service date)
- Massive Penske Distribution Centre in Wacol, QLD with 1.3M+ parts in stock
- Strong warranty coverage with extended plans available
In Summary – Why the X-Series?
If you’re a fleet manager looking to future-proof your assets or an owner-driver needing serious grunt, the Western Star X-Series delivers:
- Legendary durability
- Whole-of-life value
- Class-leading technology
- Driver-focused design
Whether it’s metro, regional, off-road or interstate, there’s a Western Star to match your mission.
