Cummins 4BT3.9 Engine Assembly - New
Cummins
Cummins 4BT3.9 Engine Assembly
New
- Supplied as
- Engine Assembly
- Arrangement / engine number
- Confirm against engine plate
- Displacement
- 3.9 L B3.9 family
- Reference configuration
- Inline four-cylinder, turbocharged B3.9 family
Manufacturer reference data; the supplied build must be confirmed.
Manufacturer application references
- Cummins lists B-series industrial engines for construction and agricultural machinery; the precise installation depends on the engine build.
Confirm the full engine suffix, arrangement and machine serial number for an exact match.
With your order
- 1-year standard brand warranty Included
- Technical review & engine matchingIncluded at no extra cost. We compare the proposed engine with your current assembly using its data plate, arrangement and configuration to confirm the exact match before ordering. Included
- Complete engine testing video On request
- Custom packaging and pallet labeling On request
- Custom testing requirements On request
More service options
Pre-dispatch inspection welcomeOptional paid
Radiator, compressor, injector and configuration add-onsBy quote
Any extra cost and preparation time are agreed before proceeding.
Explore engine servicesFreight is charged per engine and shown at checkout.
- No core deposit or return
- International shipping on all engines
Product details
Engine overview
Cummins 4BT3.9 engine assembly. The four-cylinder B3.9 platform is a compact mechanical-engine family; a 4BT build uses turbocharging. Its simplicity makes the original fuel, cooling and mounting arrangement especially important when selecting a replacement.
Cummins documents the 3.9 L four-cylinder B-family, while the offered unit's 4BT equipment arrangement and rating must be read from its serial and build records.
Configuration & included components
- Engine model: Cummins 4BT3.9.
- Condition: New.
- Supply scope: engine assembly; included components and exact build are confirmed in the written order specification.
- Product code: NYE-CUM-4BT3-9-N-ENG-S54099493.
Warranty & delivery
- 1-year standard brand warranty
- There is no core deposit and no requirement to return your old engine.
- International DDP: Available for all engines, with estimated delivery in 2–3 weeks. Duties, tariffs, import taxes and customs fees are included.
- Freight is charged per engine and shown at checkout.
Technical specifications
The figures below identify manufacturer-documented models or clearly marked supplier references. They do not establish the rating, emissions certification, included accessories or exact weight of this offered assembly.
| Specification | Reference detail |
|---|---|
| Reference configuration | Inline four-cylinder, turbocharged B3.9 family |
| Displacement | 3.9 L B3.9 family |
| Bore × stroke | 102 × 120 mm on documented B3.9 variant |
| Build identification | Engine serial, configuration and CPL in Cummins dataplate records |
Technical details
Check the injection pump and governor, turbocharger orientation, flywheel housing, front drive, cooling connections and engine mounts against the old assembly. A related B3.9 generator specification cannot establish this industrial build's power or included components.
Applications & fitment
Documented application references
- Cummins lists B-series industrial engines for construction and agricultural machinery; the precise installation depends on the engine build.
These are manufacturer or machine-OEM model references, not a fitment guarantee for the particular assembly supplied.
Confirm your engine match
Email info@nyengines.com with the current engine plate, machine model and serial, destination, and product code NYE-CUM-4BT3-9-N-ENG-S54099493. We will check the required configuration and included components with you.
Buyer guide
- Send the original engine serial and CPL, not only the 4BT3.9 family name.
- Compare the fuel-pump and turbo installation plus the flywheel housing and mounting points.
- Confirm whether accessories and cooling hardware are required with the assembly.
Buying questions
Does every 4BT3.9 assembly interchange?
No. Cummins identifies engine configuration and CPL by serial; those details and the machine interface govern the replacement.
Is the published B-series output this engine's rating?
No. Published family and generator variants cover different ratings. Confirm the supplied serial and rating plate before ordering.