2021 Kenworth T3 Series Overview, Reviews, Ratings & Specs
The 2021 Kenworth T3 Series, primarily represented by the T370 medium-duty truck, is a versatile workhorse built for vocational applications. Known for its robust conventional cab chassis, it offers a wide range of configurations for diverse industries. Trims and options are extensive, dictated by specific body types like refuse, utility, or flatbed. New pricing typically ranged from $70,000 to over $150,000, depending on customization. Its popularity stems from Kenworth's reputation for quality, durability, and a driver-friendly environment.
The Good
The 2021 Kenworth T3 Series boasts strong performance with proven Cummins engines, ensuring reliability that appeals to practical business owners. Its comfortable cab and excellent visibility reduce driver fatigue, fostering an emotional connection to a quality work environment. The robust design and customizable chassis offer superb efficiency for various vocations, delivering excellent long-term value and operational versatility.
The Bad
Potential weaknesses for the 2021 Kenworth T3 Series include its higher initial purchase price compared to some rivals. Depending on configuration, fuel economy can vary significantly, impacting operational costs. Furthermore, advanced driver-assistance features, while available, might not be standard across all configurations, requiring careful specification to ensure comprehensive safety suites.
2021 Kenworth T3 Series: Quick Overview
The 2021 Kenworth T3 Series, primarily the T370, is a highly configurable medium-duty truck, meaning "trim-level features" are more about vocational customization than fixed packages. Here are key specifications:
- Engine Options: The T370 typically offers PACCAR PX-7 and PACCAR PX-9 diesel engines. These are rebadged Cummins engines renowned for their reliability and performance in medium-duty applications.
- Horsepower:
- PACCAR PX-7: Ranges from approximately 200 hp to 360 hp.
- PACCAR PX-9: Ranges from approximately 260 hp to 450 hp.
- Torque:
- PACCAR PX-7: Ranges from 520 lb-ft to 800 lb-ft.
- PACCAR PX-9: Ranges from 720 lb-ft to 1,250 lb-ft.
- Transmission Options: Available with both manual (e.g., Eaton Fuller) and automatic transmissions (e.g., Allison 2500, 3000, and 3500 Series), allowing for optimal pairing with specific vocational needs and driver preferences. Allison automatics are particularly popular for applications requiring frequent stops and starts.
- Fuel Economy: This varies significantly based on engine, transmission, specific application (e.g., refuse vs. regional haul), load weight, and driving routes. Commercial trucks do not have standardized EPA fuel economy ratings like passenger vehicles. Owners focus on "gallons per hour" or "miles per gallon" in real-world scenarios, which can range widely, often from 6-10 MPG for lighter, over-the-road applications, and much lower for heavy vocational tasks.
- 0-60 Times: Not a relevant metric for medium-duty commercial trucks. Performance is measured by torque, gradeability, and efficiency in hauling and working.
- Towing/Payload Capacity: Highly variable based on Gross Vehicle Weight Rating (GVWR) and Gross Combination Weight Rating (GCWR). The T370 typically comes in GVWRs ranging from 26,000 lbs to 33,000 lbs, making it suitable for a wide range of medium-duty tasks. Maximum GCWRs can exceed 50,000 lbs with proper setup.
- Customization/Trim-Level Features:
- Cab Configurations: Day cab is standard; extended cab options are available for more interior space.
- Axle Configurations: Various front and rear axle capacities, wheelbases, and frame rail options to support diverse body types (e.g., dump, mixer, refuse, utility, box, flatbed).
- Interior Options: Air-ride seats, power windows/locks, cruise control, air conditioning, and a range of dash layouts with analog and digital gauges.
- Driver Comfort: Ergonomic dash layout, spacious footwell, excellent visibility, and a quiet cab for a medium-duty truck.
- Connectivity: Basic infotainment with AM/FM/Bluetooth, pre-wired for telematics systems.
2021 Kenworth T3 Series Specifications
Vehicle Information
| Year | 2021 |
| Make | Kenworth |
| Model | T3 Series |
| Trim | - |
| Style | - |
| Type | Truck |
| Category | Heavy Truck |
Manufacturing Details
| Made In | Canada |
| Manufacturing City | MEXICALI |
Dimensions
| Doors | - |
| Curb Weight | - |
| Gross Vehicle Weight Rating | 33001 pounds |
| Overall Height | - |
| Overall Length | - |
| Overall Width | - |
| Wheelbase Length | - |
| Standard Seating | - |
Engine & Performance
| Engine | 6.7-L L-6 Diesel |
| Engine Size | 6.7L |
| Engine Cylinders | 6 |
| Transmission | - |
| Transmission Type | - |
| Transmission Speeds | - |
| Drivetrain | Rear-Wheel Drive |
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 Kenworth T3 Series Have?
The 2021 Kenworth T3 Series, like its predecessors, generally enjoys a reputation for strong reliability, largely due to its use of industry-standard components, particularly Cummins PACCAR engines and Allison transmissions. However, as with any complex commercial vehicle, certain issues can arise.
Frequently Reported Problems:
Recalls:
Recalls for commercial trucks can be quite specific, often related to a particular component supplier or a batch of vehicles. For the 2021 model year, Kenworth, under parent company PACCAR, has had various recalls. These could include issues like:
Long-Term Reliability Concerns:
The long-term reliability of the T3 Series is generally excellent, with many units exceeding 500,000 miles in vocational service. However, proactive maintenance is paramount. Components subject to heavy wear in vocational applications, such as suspension bushings, steering components, and exhaust aftertreatment systems, will eventually require attention. The durability of the truck is highly dependent on the application, maintenance schedule, and driver habits. Rust on frame rails and body mounts can become a concern in regions with harsh winter conditions if not properly maintained.
Frequently Reported Problems:
- DEF System Issues: Problems with Diesel Exhaust Fluid (DEF) systems, including clogged filters, faulty sensors, or crystallization, have been a common headache across the industry for post-2010 diesel trucks, not just Kenworth. These can lead to derating of the engine if not addressed promptly.
- Electrical Gremlins: While not widespread, some owners report occasional electrical issues related to body upfitting, wiring harnesses, or sensor failures. These are often complex to diagnose due to the highly customized nature of vocational trucks.
- DPF Regeneration: Diesel Particulate Filter (DPF) issues, such as failed passive or active regenerations, can lead to DPF clogging, resulting in reduced performance and increased downtime. This is also a common issue with modern diesel engines across brands.
- Air System Leaks: Air brake and suspension systems are robust, but over time, minor air leaks can develop in lines or fittings, leading to air pressure loss.
- HVAC System Malfunctions: Reports of HVAC (heating, ventilation, and air conditioning) issues, such as refrigerant leaks or blower motor problems, are not uncommon over the vehicle's lifespan.
Recalls:
Recalls for commercial trucks can be quite specific, often related to a particular component supplier or a batch of vehicles. For the 2021 model year, Kenworth, under parent company PACCAR, has had various recalls. These could include issues like:
- Brake system component defects (e.g., air dryer, brake valves).
- Steering system components that may not meet specifications.
- Lighting issues (e.g., misaligned headlights or faulty wiring).
- Seat belt anchorages or other safety equipment.
- Engine or exhaust system components (e.g., EGR coolers, fuel lines) for specific engine builds.
Long-Term Reliability Concerns:
The long-term reliability of the T3 Series is generally excellent, with many units exceeding 500,000 miles in vocational service. However, proactive maintenance is paramount. Components subject to heavy wear in vocational applications, such as suspension bushings, steering components, and exhaust aftertreatment systems, will eventually require attention. The durability of the truck is highly dependent on the application, maintenance schedule, and driver habits. Rust on frame rails and body mounts can become a concern in regions with harsh winter conditions if not properly maintained.
How long will the 2021 Kenworth T3 Series last?
The 2021 Kenworth T3 Series is designed for long-term commercial service, with an average lifespan often reaching 15-20 years or 500,000 to over 750,000 miles with diligent maintenance. For vocational applications involving significant idle time or PTO use, "hours of service" can be a more relevant metric. Kenworth's robust construction and reliable Cummins PACCAR engines contribute to its excellent long-term durability.
Over time, weaknesses can emerge, primarily related to the strenuous demands of commercial use. These include wear on suspension components, steering linkages, air system leaks, and the inevitable deterioration of exhaust aftertreatment systems (DPF/SCR). Regular fluid changes, chassis greasing, and proactive attention to DPF regeneration are crucial to maximizing longevity and mitigating these common wear points. Neglect leads to accelerated component failure and increased operational costs.
Over time, weaknesses can emerge, primarily related to the strenuous demands of commercial use. These include wear on suspension components, steering linkages, air system leaks, and the inevitable deterioration of exhaust aftertreatment systems (DPF/SCR). Regular fluid changes, chassis greasing, and proactive attention to DPF regeneration are crucial to maximizing longevity and mitigating these common wear points. Neglect leads to accelerated component failure and increased operational costs.
What Technology & Safety Features are Included?
The 2021 Kenworth T3 Series incorporates a blend of functional technology aimed at improving driver productivity, safety, and operational efficiency, rather than luxury entertainment typical of passenger cars.
Built-in Tech & Entertainment:
Driver-Assistance & Safety Features:
While commercial trucks don't undergo NHTSA crash tests for star ratings, their safety systems focus on accident prevention and driver protection through robust design.
Crash-Test Ratings:
It is important to note that commercial trucks like the Kenworth T3 Series do not receive NHTSA or IIHS crash test ratings (e.g., 5-star ratings) like passenger vehicles. Safety is ensured through compliance with extensive commercial vehicle safety regulations (FMVSS/CMVSS), robust structural design, and the integration of active safety technologies aimed at preventing accidents.
Built-in Tech & Entertainment:
- Infotainment: Standard systems typically include an AM/FM radio with Bluetooth connectivity for hands-free calling and audio streaming. USB ports are usually available. Higher trims or optional packages may include a basic touchscreen display with more integrated functions, though not as advanced as passenger vehicle systems.
- Driver Information Display: A digital display within the gauge cluster provides critical vehicle operational data, diagnostics, and performance metrics, such as fuel economy, DEF levels, and service intervals.
- Telematics Pre-wiring: Kenworth trucks are often pre-wired for telematics systems like Kenworth TruckTech+ Remote Diagnostics, which can monitor vehicle health, provide fault code notifications, and facilitate predictive maintenance, reducing downtime.
Driver-Assistance & Safety Features:
While commercial trucks don't undergo NHTSA crash tests for star ratings, their safety systems focus on accident prevention and driver protection through robust design.
- Standard Safety:
- Air brakes with ABS (Anti-lock Braking System) are standard, providing crucial stopping power and control.
- Excellent forward visibility thanks to large windshields and well-positioned mirrors.
- Robust cab construction designed to meet commercial vehicle safety standards.
- Optional Driver-Assistance Systems (ADAS): These features are increasingly common and available on the T3 Series, though often as optional extras:
- Bendix Wingman Fusion: An integrated radar and camera system that provides collision mitigation technology, including adaptive cruise control, lane departure warning, and active braking to help prevent or mitigate rear-end collisions.
- Lane Departure Warning (LDW): Alerts the driver if the truck drifts out of its lane without signaling.
- Roll Stability Control (RSC): Helps prevent rollovers by automatically applying brakes to individual wheels.
- Electronic Stability Control (ESC): Works with ABS to help maintain control during emergency maneuvers.
- Side Object Detection: Radar-based systems to detect objects in the truck's blind spots.
- Driver Performance Monitoring: Systems that track driver behavior (e.g., harsh braking, rapid acceleration) to improve safety and efficiency.
- Visibility Enhancements: Optional features like heated power mirrors, additional convex mirrors, and work lights further enhance driver awareness.
Crash-Test Ratings:
It is important to note that commercial trucks like the Kenworth T3 Series do not receive NHTSA or IIHS crash test ratings (e.g., 5-star ratings) like passenger vehicles. Safety is ensured through compliance with extensive commercial vehicle safety regulations (FMVSS/CMVSS), robust structural design, and the integration of active safety technologies aimed at preventing accidents.
What Colors Options are Available?
Exterior Colors
Kenworth White
Kenworth Black
Kenworth Red
Patriot Blue
Metallic Silver
Interior Colors
Charcoal Grey
Onyx Black
Baja Tan
2021 Kenworth T3 Series Prices and Market Value
When new, the 2021 Kenworth T3 Series (T370) typically ranged from approximately $70,000 to well over $150,000, heavily dependent on chassis configuration, engine choice, transmission, and especially the vocational body installed (e.g., dump, refuse, utility).
As of late 2023/early 2024, current used market prices for a 2021 Kenworth T370 can range significantly, often from $55,000 to $120,000+, reflecting its original specification, mileage/hours, condition, and the type of body. Trucks with specialized, high-value bodies (like concrete pumpers or specialized utility bodies) tend to retain more value.
Depreciation for commercial trucks is generally slower than for passenger cars in the initial years, but it is steady. Factors affecting resale value include the overall condition of the chassis and body, maintenance history, engine hours/mileage, and the continued demand for the specific vocational application. Well-maintained trucks with common, versatile bodies like dry vans or flatbeds usually command better resale values. Specialized bodies may have a smaller buyer pool, but can fetch higher prices from the right buyer.
As of late 2023/early 2024, current used market prices for a 2021 Kenworth T370 can range significantly, often from $55,000 to $120,000+, reflecting its original specification, mileage/hours, condition, and the type of body. Trucks with specialized, high-value bodies (like concrete pumpers or specialized utility bodies) tend to retain more value.
Depreciation for commercial trucks is generally slower than for passenger cars in the initial years, but it is steady. Factors affecting resale value include the overall condition of the chassis and body, maintenance history, engine hours/mileage, and the continued demand for the specific vocational application. Well-maintained trucks with common, versatile bodies like dry vans or flatbeds usually command better resale values. Specialized bodies may have a smaller buyer pool, but can fetch higher prices from the right buyer.
2021 Kenworth T3 Series Cost of Ownership
Ownership costs for a 2021 Kenworth T3 Series are substantial, typical for a commercial vehicle, making it costly to own but potentially highly profitable for businesses. Insurance premiums are significantly higher than passenger cars, varying by application, coverage, and operator history. Fuel costs are a major expense, with diesel prices fluctuating and consumption varying greatly based on load and route, often at 6-10 MPG. Maintenance is critical and includes routine oil changes, DPF/SCR system care, brake servicing, and chassis lubrication, all more frequent and expensive than for cars. Repairs for commercial-grade components are costly. Long-term, these trucks offer excellent durability, but only if an extensive preventative maintenance schedule is strictly adhered to, justifying the investment for continuous operation.
2021 Kenworth T3 Series Fuel Efficiency
Fuel Type
Diesel
Fuel Capacity
-
City Mileage
-
Highway Mileage
-
2021 Kenworth T3 Series 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 Kenworth T3 Series Insurance
Insurance for a 2021 Kenworth T3 Series is moderately priced, reflecting its status as a Truck with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2021 Kenworth T3 Series Compare to Other Truck?
The 2021 Kenworth T3 Series (T370) competes in the highly competitive North American medium-duty truck market against established rivals such as the Freightliner M2 106, Peterbilt 337, International MV Series, and Hino 268/338. Each offers distinct advantages.
Performance:
Features:
Kenworth and Peterbilt often share a premium feel in their interiors, with a focus on driver comfort and ergonomics. Freightliner and International offer extensive customization and can be spec'd from basic work trucks to more premium offerings. Hino typically provides a good standard feature set, including an emphasis on safety and basic telematics. All offer similar optional ADAS features like collision mitigation and lane departure warning, but availability can vary.
Reliability:
All these brands build reliable medium-duty trucks. Kenworth and Peterbilt, with their PACCAR/Cummins engines and Allison transmissions, have a strong track record. Freightliner and International are also highly regarded, with widespread service support. Hino is often cited for its exceptional durability, especially its powertrain.
Price:
Kenworth and Peterbilt often command a slightly higher initial purchase price due to their perceived premium brand status and quality. Freightliner and International can be more competitively priced, particularly for fleet purchases. Hino offers excellent value, often with strong warranty packages.
Recommendations:
Ultimately, the 'better' alternative depends heavily on the specific vocational application, desired powertrain, dealer proximity, and budget.
Performance:
- Kenworth T370: Known for its PACCAR PX-7 and PX-9 engines (Cummins-derived), offering robust power and torque delivery. Its performance is optimized for vocational applications, providing strong gradeability and hauling capabilities.
- Freightliner M2 106: Often equipped with Detroit DD5 or DD8 engines, or Cummins B6.7. Offers comparable performance and is often praised for its strong dealer network and extensive customization options.
- Peterbilt 337: A sibling to the Kenworth T370, also using PACCAR PX engines. Performance is virtually identical, with differences mainly in styling and interior appointments.
- International MV Series: Features International's A26 engine (for heavier configurations) or Cummins B6.7. Offers a strong, durable chassis and a modern cab design.
- Hino 268/338: Powered by Hino's own J-Series engines. Known for its strong reputation for reliability and often comes with a comprehensive warranty. Performance is competitive, particularly for urban delivery and lighter vocational tasks.
Features:
Kenworth and Peterbilt often share a premium feel in their interiors, with a focus on driver comfort and ergonomics. Freightliner and International offer extensive customization and can be spec'd from basic work trucks to more premium offerings. Hino typically provides a good standard feature set, including an emphasis on safety and basic telematics. All offer similar optional ADAS features like collision mitigation and lane departure warning, but availability can vary.
Reliability:
All these brands build reliable medium-duty trucks. Kenworth and Peterbilt, with their PACCAR/Cummins engines and Allison transmissions, have a strong track record. Freightliner and International are also highly regarded, with widespread service support. Hino is often cited for its exceptional durability, especially its powertrain.
Price:
Kenworth and Peterbilt often command a slightly higher initial purchase price due to their perceived premium brand status and quality. Freightliner and International can be more competitively priced, particularly for fleet purchases. Hino offers excellent value, often with strong warranty packages.
Recommendations:
- Similar Alternatives: The Peterbilt 337 is the most direct "similar" alternative, as it shares much of its underlying platform with the Kenworth T370. The Freightliner M2 106 is also an excellent and highly popular alternative, offering similar versatility and strong support.
- For Value/Reliability: The Hino 268/338 is a compelling option, often praised for its excellent long-term reliability and competitive pricing, making it a strong contender for businesses prioritizing uptime and lower total cost of ownership.
- For Customization/Advanced Tech: The International MV Series and Freightliner M2 106 can be highly customized and equipped with advanced telematics and safety features, making them suitable for fleets requiring cutting-edge integration.
Ultimately, the 'better' alternative depends heavily on the specific vocational application, desired powertrain, dealer proximity, and budget.
Final Verdict: Is the 2021 Kenworth T3 Series a Good Truck?
The 2021 Kenworth T3 Series is an ideal choice for businesses and operators seeking a robust, reliable, and highly customizable medium-duty vocational truck. It's particularly well-suited for applications demanding durability and driver comfort, such as construction, utility work, refuse collection, or regional delivery services. Its PACCAR/Cummins powertrains and Allison transmission options provide proven performance.
It is definitely worth buying for those who prioritize long-term durability and uptime, understanding that the initial investment might be higher. Buying new allows for precise customization to exact vocational needs. However, a well-maintained used 2021 T370 can offer excellent value, especially if its body configuration aligns with your requirements. When buying used, prioritize a comprehensive inspection, especially of the exhaust aftertreatment system and ensure a full-service history. It might not be the most economical in terms of initial price, but its strong resale value and operational longevity often justify the premium for serious commercial operators.
It is definitely worth buying for those who prioritize long-term durability and uptime, understanding that the initial investment might be higher. Buying new allows for precise customization to exact vocational needs. However, a well-maintained used 2021 T370 can offer excellent value, especially if its body configuration aligns with your requirements. When buying used, prioritize a comprehensive inspection, especially of the exhaust aftertreatment system and ensure a full-service history. It might not be the most economical in terms of initial price, but its strong resale value and operational longevity often justify the premium for serious commercial operators.
Cathleen V
Cathleen is an exceptional freelance writer covering hot topics in the automotive world from a gearhead's perspective. Her articles delve into various aspects of automotive technology and history, offering readers detailed insights into engine performance, reliability, and maintenance. Through her engaging and informative writing, Cathleen provides valuable information to automotive enthusiasts and consumers alike, helping them make informed decisions about vehicle maintenance and purchases.