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2021 Western Star Trucks New 4900 Chassis Overview, Reviews, Ratings & Specs

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Drew B | December 17, 2025
The 2021 Western Star Trucks 4900 Chassis is a robust vocational truck known for its exceptional durability and customizable configurations. While primarily a chassis for specialized bodies, its legacy spans decades, offering iconic styling with modern engineering. Key trims often revolve around specific vocational applications like construction, vocational, and specialty highway use. Pricing for a new chassis can vary significantly based on specifications but generally starts in the mid-$100,000s and can climb much higher. Its popularity stems from its rugged build, powerful performance, and the flexibility it offers in creating a truck for virtually any demanding job.
The Good

The 2021 Western Star 4900 Chassis excels in raw performance and legendary reliability, built to conquer tough jobs. Its commanding presence appeals emotionally, while its durable construction and customizable options offer immense practical value. Comfort in the cab ensures driver productivity on long hauls. This truck is a workhorse designed for longevity and unwavering capability.

The Bad

While renowned for toughness, potential owners should watch out for the 4900's less refined interior compared to some competitors, and its fuel economy might not be its strongest suit for lighter applications. The sheer number of customization options, while a strength, can also lead to complex configurations that require careful spec'ing to avoid over-complexity or unintended compromises.

2021 Western Star Trucks New 4900 Chassis: Quick Overview

  • Engine Options: The 2021 Western Star 4900 Chassis typically offers a range of powerful diesel engines from Detroit Diesel and Cummins. Common options include the Detroit DD13, DD15, and DD16, as well as Cummins ISX15 engines.

  • Horsepower: Horsepower ratings can vary widely depending on the chosen engine and configuration, but generally range from approximately 400 horsepower up to over 600 horsepower for the most potent options.

  • Fuel Economy: Specific fuel economy figures are highly dependent on the engine, transmission, axle ratios, load, and driving conditions. As a heavy-duty vocational truck, fuel efficiency is often secondary to power and durability, but modern engines offer improved efficiency over older models. Expect mileage to be significantly lower than light-duty vehicles, often in the single digits per gallon for highway driving under load.

  • 0-60 Times: 0-60 mph times are not typically a primary metric for vocational trucks like the 4900 chassis. Performance is measured more by its ability to haul heavy loads and maintain speed on inclines. With a substantial load, acceleration will be very gradual.

  • Towing Capacity: The towing capacity is not a fixed specification for the chassis itself but rather determined by the specific upfit (body and equipment installed) and the Gross Combined Weight Rating (GCWR) of the truck. These chassis are designed to handle very heavy loads, with GCWRs often exceeding 100,000 pounds for specialized applications.

  • Trim-Level Features: The 4900 is primarily a chassis, meaning trim levels are more about vocational application and optional equipment packages rather than traditional interior luxury trims found in passenger vehicles. Key features are often dictated by the vocational purpose:
    • Durability: Reinforced frames, heavy-duty suspension components, and robust drivelines.
    • Customization: A wide array of wheelbase options, axle configurations, and steering setups.
    • Powertrain: Selection of powerful engines and transmissions (manual and automatic) suited for heavy-duty work.
    • Cab Options: Various cab configurations, including day cabs and extended or factory sleeper options, often with a focus on functionality.
    • Optional Equipment: Numerous options for PTOs, auxiliary hydraulics, specialized lighting, and driver comfort features tailored to specific vocational needs.

2021 Western Star Trucks New 4900 Chassis Specifications

Vehicle Information
Year 2021
Make Western Star Trucks
Model New 4900 Chassis
Trim -
Style -
Type Truck
Category Heavy Truck
Manufacturing Details
Made In United States
Manufacturing City CLEVELAND
Dimensions
Doors -
Curb Weight -
Gross Vehicle Weight Rating 33001 pounds
Overall Height -
Overall Length -
Overall Width -
Wheelbase Length -
Standard Seating -
Engine & Performance
Engine 15.6L I6
Engine Size 15.6L
Engine Cylinders 6
Transmission -
Transmission Type -
Transmission Speeds -
Drivetrain 8x4
Additional Features
Anti-Brake System -
Steering Type -
Pricing
Manufacturer Suggested Retail Price (MSRP) -
Invoice Price -
Delivery Charges -

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What Problems Does the 2021 Western Star Trucks New 4900 Chassis Have?

The 2021 Western Star 4900 Chassis, being a workhorse in demanding environments, generally boasts strong long-term reliability. However, like any heavy-duty vehicle, specific issues can arise. One common area for concern across many heavy trucks, not exclusive to the 4900, can be related to the complexity of modern emissions systems. These can sometimes lead to diagnostic trouble codes or require specialized maintenance. Drivetrain components, such as transmissions and differentials, are built for durability but can experience wear over extensive use, especially under heavy, continuous loads. Electrical gremlins, though infrequent, can sometimes pop up, potentially affecting various systems from dashboard lights to engine controls. Some owners have reported issues with HVAC systems needing recalibration or repair over time, particularly in extreme climates. Body and chassis components, while robust, can be subject to corrosion in regions with heavy road salt use, necessitating diligent washing and preventative measures. Recalls are periodically issued for heavy trucks, and these typically address specific component issues identified by the manufacturer. For the 2021 model year, owners should stay informed about any safety or emissions-related recalls issued by Western Star or its component suppliers, often related to braking systems, electrical harnesses, or software updates. Long-term reliability is heavily influenced by maintenance. Consistent adherence to the manufacturer's recommended service intervals, using high-quality fluids and parts, and addressing minor issues promptly will significantly contribute to the longevity and dependable operation of the 4900 Chassis. It is advisable for owners to consult their service records and any available owner forums or technical service bulletins for the most up-to-date information on any specific model year concerns.

How long will the 2021 Western Star Trucks New 4900 Chassis last?

The 2021 Western Star 4900 Chassis is engineered for an exceptionally long service life, often well into the hundreds of thousands, if not over a million miles, with proper care. Owner data and maintenance habits are paramount. Trucks used for long-haul, consistent work with diligent fluid changes, preventative maintenance, and timely repairs can easily last 10-15 years or more. Weaknesses that emerge over time, particularly with very high mileage, might include wear on suspension components, potential for turbocharger or EGR system issues (common to modern diesels), and wear on interior elements due to constant use. However, the core chassis and powertrain are built with robust materials to withstand considerable stress, making it a durable investment for demanding vocational applications.

What Technology & Safety Features are Included?

The 2021 Western Star 4900 Chassis, while prioritizing robust functionality for vocational use, does incorporate modern technology and safety features. Built-in tech typically focuses on essential driver information and operational efficiency. The instrument cluster often features digital displays providing critical data on engine performance, fuel levels, and system diagnostics. While not laden with the extensive infotainment systems found in consumer vehicles, it may offer integrated audio systems with AM/FM radio and auxiliary inputs for mobile devices. Bluetooth connectivity for hands-free calling can be an option. Driver-assistance features are generally geared towards enhancing safety in operational environments. These can include features like advanced stability control systems to mitigate rollovers, anti-lock braking systems (ABS) for controlled stopping, and potentially hill start assist. Visibility is a key safety aspect, with large mirrors and the option for auxiliary lighting packages to improve illumination in dark or hazardous conditions. For vocational applications, features like electronic logging devices (ELD) integration are common to comply with regulations. Safety is further enhanced by the robust construction of the cab itself, designed to withstand significant impact. While formal crash-test ratings like those for passenger cars are not typically conducted on heavy-duty truck chassis, their design inherently prioritizes occupant protection through reinforced structures and safety belts. Optional safety features might include lane departure warning systems, collision mitigation systems, and adaptive cruise control, especially on highway-oriented configurations. Advanced telematics systems can also be integrated to monitor vehicle health, driver behavior, and provide remote diagnostics, further contributing to safety and operational efficiency.

What Colors Options are Available?

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2021 Western Star Trucks New 4900 Chassis Prices and Market Value

When new, the 2021 Western Star 4900 Chassis price could range significantly, starting from around $130,000 to $200,000+ depending heavily on engine, transmission, axle configuration, and any specific vocational options. Used market prices for a 2021 model can vary widely, but expect to see them in the $80,000 to $150,000 range, again dictated by mileage, condition, and remaining warranty. Depreciation is generally less aggressive for vocational trucks compared to consumer vehicles, especially for well-maintained units with desirable configurations. Factors affecting resale value include overall condition, mileage, maintenance history, presence of any specialized equipment, and market demand for specific vocational types. A truck that has been regularly serviced and hasn't been subjected to extreme abuse will hold its value better.

2021 Western Star Trucks New 4900 Chassis Cost of Ownership

Owning a 2021 Western Star 4900 Chassis is generally a costly endeavor, reflecting its heavy-duty nature. Insurance premiums will be substantial due to the high value and risk associated with commercial trucking. Fuel costs will be significant, as these trucks are powered by large diesel engines designed for power, not necessarily economy, with mileage often in the single digits per gallon. Maintenance and repair costs are also high; specialized diesel mechanics and genuine parts are expensive. Routine maintenance, while crucial for longevity, adds to the operational expense. In summary, the 4900 Chassis is a costly vehicle to own, but its value is derived from its unparalleled durability and capability in demanding vocational applications.

2021 Western Star Trucks New 4900 Chassis Fuel Efficiency

Fuel Type Diesel
Fuel Capacity -
City Mileage -
Highway Mileage -

2021 Western Star Trucks New 4900 Chassis Warranty

Basic
Original warranty 0 months / No data
Estimated remaining Expired
Powertrain
Original warranty 0 months / No data
Estimated remaining Expired
Rust
Original warranty 0 months / No data
Estimated remaining Expired

2021 Western Star Trucks New 4900 Chassis Insurance

Insurance for a 2021 Western Star Trucks New 4900 Chassis is moderately priced, reflecting its status as a Truck with strong safety ratings and
reasonable repair costs.

How Does the 2021 Western Star Trucks New 4900 Chassis Compare to Other Truck?

The 2021 Western Star 4900 Chassis competes in the tough vocational truck segment, facing strong rivals like the Freightliner 114SD/122SD, Kenworth T880/W990, and Peterbilt 567/579. In terms of performance, the 4900 is a titan, offering robust powertrains and chassis designed for extreme duty, often matching or exceeding competitors in raw hauling and towing capabilities. Its customizable nature allows for highly specialized configurations, giving it an edge for unique applications. Features wise, Western Star often emphasizes ruggedness and driver functionality over cutting-edge luxury tech. While competitors like Freightliner and Peterbilt might offer more integrated digital interfaces and advanced driver aids as standard, the 4900 provides a solid foundation that can be outfitted with necessary vocational technology. Reliability is a hallmark of Western Star; they are renowned for their durable construction and long service life, often considered on par with or exceeding Kenworth and Peterbilt in certain vocational applications. Competitors like the Freightliner 114SD/122SD offer a strong blend of performance and modern features, often at a slightly more competitive price point, and benefit from Daimler Truck's extensive dealer network. The Kenworth T880 is another formidable contender, known for its build quality and driver comfort. The Peterbilt 567 is a direct competitor, often chosen for its distinctive styling and robust vocational capabilities. Regarding price, the 4900 chassis typically sits in a similar range to its direct competitors, with pricing heavily dependent on specification. It's not uncommon for these heavy-duty vocational chassis to reach well into the six figures. For a buyer seeking ultimate durability and a truck that can be precisely tailored for exceptionally demanding tasks, the 4900 is an excellent choice. However, if a more refined interior or slightly more integrated electronic features are a priority, a Kenworth T880 or Peterbilt 567 might be worth considering. For broader parts availability and potentially slightly lower initial cost, the Freightliner 114SD/122SD are strong alternatives.

Final Verdict: Is the 2021 Western Star Trucks New 4900 Chassis a Good Truck?

The 2021 Western Star 4900 Chassis is ideal for businesses and owner-operators requiring an extremely durable, customizable, and high-performance truck for demanding vocational applications such as heavy construction, refuse hauling, or specialized transport. It is unequivocally worth buying if the priority is longevity, ruggedness, and the ability to configure the truck precisely for a specific, tough job. New purchases offer the full spectrum of customization and warranty, but come at a premium. Purchasing a well-maintained used 2021 model can offer significant value, provided its history is thoroughly vetted and it meets specific operational needs. This chassis is less suited for those prioritizing fuel efficiency or a plush, car-like interior; its strength lies in its unwavering capability and robust build quality designed to withstand years of hard work.

2021 Western Star Trucks New 4900 Chassis Owner Reviews

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Drew B

Drew is a seasoned automotive expert and contributor to VinCheck.info. With nearly 15 years of experience as a former Porsche technician, he brings a wealth of hands-on knowledge to his writing. Born in North Carolina, a region renowned for its deep-rooted NASCAR culture, Drew developed a passion for cars early in life, often building and working on vehicles from a young age. At VINCheck, Drew leverages his extensive technical background to provide in-depth analyses of various vehicles. His articles often focus on engine performance, reliability, and maintenance insights, offering readers practical information grounded in real-world experience. Some of his notable contributions include reviews on the Mazda CX-5's longevity and detailed examinations of engine options for models like the 2011 Toyota Camry and Tacoma