What Happens When a NOx Sensor Fails
A crucial component in your truck's aftertreatment system
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Western Star Trucks has built a reputation for manufacturing some of the most durable, innovative, and driver-focused heavy-duty trucks in the industry. But that reputation wasn't earned overnight---it took decades of commitment to quality, craftsmanship, and innovation.
The Western Star Origin
Founded in 1967, Western Star started in Cleveland, Ohio, with manufacturing operations in Kelowna, British Columbia, Canada. From the outset, the company embraced a core belief that would define its legacy: the driver is the most valuable asset in trucking. This philosophy didn't just shape Western Star's marketing---it influenced every decision about design, engineering, and customer support.
As demand for robust trucks in the mining, logging, and oil industries grew, Western Star expanded its Kelowna plant to 250,000 square feet, adding another 50,000 square feet for warehousing. The company's reputation for rugged, customizable trucks spread across North America.
The 1980s marked a decade of growth and innovation. Western Star introduced product advancements that focused on driver comfort and visibility, including more spacious cabs and improved sightlines. The development of a state-of-the-art wrap around dashboard helped attract highway tractor drivers, expanding the company's customer base beyond traditional vocational applications.
By the late 1990s, Western Star had firmly established itself as a premier manufacturer of both vocational and long haul trucks. One standout innovation during this era was the Star Light Sleeper, featuring an ultra-lightweight honeycomb core made from polypropylene---an industry-first for reducing weight and maintaining strength.
New Ownership Brought New Innovations
Daimler Trucks North America acquired Western Star in 2000. The move to Portland, Oregon, marked a new chapter of expansion and integration with one of the world's most influential truck manufacturers.
The 2010s brought even more groundbreaking innovation. In 2011, Western Star launched the 4700, a tough and versatile truck tailored for short BBC (bumper-to-back-of-cab) applications like snow plows and mixers. Three years later, the 5700XE hit the market with a bold, aerodynamic design that combined modern efficiency with Western Star's trademark rugged appeal---quickly becoming a favorite among highway fleets and owner-operators.
In 2020, Western Star debuted the X-Series, beginning with the 47X and 49X models. These trucks set new standards for jobsite performance, safety, strength, and technology. Designed to handle the most punishing environments, the X-Series represented a leap forward in both engineering and driver satisfaction.
Then in 2022, Western Star unveiled the 57X---the most advanced highway truck the company has ever produced. With cutting-edge safety systems, improved aerodynamics, and premium comfort, the 57X was the ultimate realization of Western Star's founding belief: that every truck should be built around the driver.
Today, Western Star continues to lead the heavy-duty truck market with a blend of old-school durability and modern innovation. Every truck rolling off the line still carries the legacy of attention to detail, driver-first design, and unyielding performance. In an era of fast-paced manufacturing, Western Star stands as a symbol of craftsmanship and staying power