Portland, Oregon — Western Star is recalling more than 21,500 heavy-duty trucks across the United States due to an electrical defect that can cause severe battery-to-starter short circuits and subsequent vehicle fires. National Highway Traffic Safety Administration filings show the safety campaign covers specific 49X rigs manufactured between the 2020 and 2026 model years alongside 47X units produced from 2021 through 2026. Fleet managers and owner-operators running these vocational trucks face a critical equipment hazard linked to a frame-mounted stud connecting the main battery feed directly to the starter motor.

The total recall population stands at approximately 21,500 vehicles, split cleanly between roughly 9,500 units of the 49X model and nearly 12,000 units of the 47X line. Although parent company Daimler Truck North America estimates that the physical defect impacts only about one percent of the recalled population, the potential consequences demand immediate attention from every CDL-A driver behind the wheel of an affected vehicle. Company engineering teams trace the core issue to an installed stud on the frame rail that bridges power to the starter, creating an unisolated pathway for electrical shorts and thermal events.

Paperwork filed with federal regulators under safety campaign 25V326 indicates that parent manufacturer Daimler Truck North America recorded 36 distinct warranty claims and 15 field reports tied to the battery flaw between March 2023 and March 2025. Initial warning signs surfaced in late 2023 when the maker logged five customer complaints regarding heavy battery corrosion, followed by a reported truck fire in December 2023 and a melted cable event in February 2024. Although Western Star initially declined to launch a field action in August 2024 citing a low failure frequency and detectability during pre-trip inspections, subsequent melted stud reports in early 2025 forced a full reopening of the safety investigation.

What This Means for Drivers

Professional drivers operating these Western Star units need to watch for specific mechanical symptoms during daily equipment checks, including sluggish cranking or a complete failure to start the engine. Visual inspections of the battery cable lug and the frame-mounted stud should focus heavily on identifying unusual white or green corrosion, thermal discoloration, or charred insulation. While no injuries or fatalities have been documented so far, operators experiencing electrical anomalies should immediately ground the truck and contact fleet maintenance personnel before hauling another load.

Industry Reaction

Major vocational fleets and independent contractors rely heavily on these severe-duty platforms for construction, logging, and heavy-haul operations where equipment reliability directly dictates daily revenue. This recall highlights the growing complexity of heavy-duty electrical architectures and underscores why thorough pre-trip and post-trip inspections remain vital for every OTR truck driver and regional operator on the highway. Maintenance departments across the freight sector are closely watching for the upcoming remedy release from Daimler Truck North America to schedule necessary chassis modifications.

Key Points

• Western Star recalled 21,500 trucks, including 9,500 units of the 49X and 12,000 units of the 47X.
• The hazard stems from a frame rail stud connecting the battery to the starter, creating a short circuit risk.
• Daimler Truck North America logged 36 warranty claims and 15 field reports tied to the issue between March 2023 and March 2025.
• Affected owners can contact Daimler customer service at 800-547-0712 referencing recall number F1020 or NHTSA campaign 25V326.

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