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Cummins B125-33 Engine – 125HP 3.9L Diesel Engine for Light Trucks
The Cummins B125-33 engine is a 3.9L inline 4-cylinder diesel engine designed for light-duty commercial vehicles. As part of the Cummins B Series engine platform, it delivers 92kW (125HP) of reliable power, making it suitable for 3–5 ton trucks, logistics vehicles, and commercial vans.
Manufactured by Dongfeng Cummins Engine Co., Ltd. (DCEC), the B125-33 adopts a turbocharged and intercooled design to ensure efficient combustion, stable performance, and long service life. It is widely used in developing markets due to its cost-effectiveness and easy maintenance.
HekoPower supplies genuine Cummins B125-33 engine assemblies with complete configuration, offering competitive wholesale pricing, fast delivery, and export-ready solutions.
Tech Specs of Cummins B125-33
General Engine Data
Engine Model: Cummins B125-33
Type: 4 Cylinders in Line
Displacement: 3.9 L
Bore * Stroke: 102 * 120
Net Weight (with flywheel & alternator): 362 Kg
Overall Dimension: 778mm*634mm*912mm
Key Performance Data
Rated Power: 92 kW/125HP
Rated Speed: 2800 rpm
Max Torque/Speed: 410 N.m @ 1500 rpm
Torque/Rated Speed: 317 N.m @ 2800 rpm
Fuel Consumption @ Rated Power: 244 g/Kw.h
Max. No-load Governed Speed: 3150 rpm
Idle-Speed: 750±100 rpm
Max Continuous Running Altitude: 3000 m
More Technical Data
Certification: Euro II
Aspiration: Turbocharged & Intercooled
Fuel System: Wuxi Weifu Pump
Compression Radio: 17.3:1
Electrical System (Starter Motor/Alternator): 12V (500A)/24V (250A)
Lowest Starting Temp Without auxiliary system: -10℃/-25℃
Cooling Method: Water cooled
Engine Cooling Fluid Volume: 7.0 L
Technical Mastery: 3.9L Cummins B125-33 125HP Engine Specs
This 92kW Cummins B125-33 truck engine is engineered for high-torque output at low speeds. With a peak torque of 410Nm at 1500 rpm, it provides the necessary "lugging" power required for city logistics and delivery vehicles. Unlike electronic alternatives, the mechanical fuel pump system in the B125-33 offers superior resilience against varying fuel qualities, reducing the maintenance cost of the Cummins 3.9L engine.
Application Excellence: From 5-Ton Trucks to 6-Meter Buses
The versatility of the DCEC Cummins B125-33 commercial vehicle engine makes it an ideal choice for various chassis configurations:
- Logistics & Delivery: The Cummins B125-33 logistics vehicle engine is the preferred heart for 3–5 ton trucks, balancing payload capacity with fuel economy.
- Public Transport: Frequently used as a Cummins B125-33 diesel engine for 6 meter buses, providing smooth acceleration and reliability.
- Retrofit & Replacement: It serves as the best replacement engine for Dongfeng EQ1092 trucks, offering a direct fit for older B-series units.
Cummins B125-33 vs. Competitors: A Comparison Guide
Cummins B125-33 vs. EQB125-20
A common question for buyers is the difference between Cummins B125-33 and EQB125-20. While both offer 125HP, the B125-33 utilizes a traditional mechanical governor system, making it easier to service in regions without advanced diagnostic tools. Conversely, the EQB series is often tailored for specific regional electronic standards. For pure mechanical reliability in 2026, the B125-33 remains the "gold standard."
- EQB125-20: Improved emission and efficiency
- B125-33: Simpler structure and lower maintenance cost
B125-33 vs B160-33
- B160-33: Suitable for medium-duty trucks
- B125-33: Ideal for lighter vehicles and urban transport
B125-33 vs B140-33
- B140-33: Higher power output for heavier loads
- B125-33: Lower fuel consumption and better cost efficiency
Global Sourcing: Wholesale DCEC B125-33 Diesel Engine from HekoPower
Buying a genuine B125-33 engine for sale requires a partner who understands international logistics. HekoPower streamlines the procurement process:
- Export Pricing: Get the latest Cummins B125-33 price 2026 directly from our wholesale desk.
- Lead Time: We maintain a 10 business days lead time for standard engine assemblies.
- Shipping Data: We provide complete B125-33 engine shipping dimensions for sea freight (approx. 778x634x912mm, 362kg) to help you calculate landed costs accurately.
DCEC B Series, original products from Dongfeng Cummins Engine Plant (DCEC), Cummins Joint Venture Plant since 1986, 50% shareholding by Cummins USA. This series mainly includes B125-33, B140-33, B160-33, B170-33, B180-33, B190-33, B210-33.
FAQ – Cummins B125-33 Engine
What is the price of Cummins B125-33 engine?
The price depends on configuration and order quantity. Contact HekoPower for a quotation.
Is the Cummins B125-33 engine reliable?
Yes, it is widely used in logistics vehicles and known for durability and fuel efficiency.
Where can I buy a genuine Cummins B125-33 engine?
You can purchase directly from HekoPower as a trusted supplier.
