4D56 16V Diesel Injectors
Compatible with Mitsubishi Challenger, Mitsubishi L200 / Triton (KB4T), Mitsubishi Pajero Sport / Shogun Sport
- OEM Tested & Calibrated
- 12-Month Warranty
- Free UK Delivery
Select the correct injector for your 4D56 16V engine below
Fits Mitsubishi Challenger, Mitsubishi L200 / Triton (KB4T), Mitsubishi Pajero Sport / Shogun Sport and more
Top injectors for 4D56 16V
Compatible Injectors for 4D56 16V
- OEM Tested
- 12-Month Warranty
- Free UK Delivery
Common problems solved by these injectors
About the 4D56 16V engine
The 4D56 16V is a 2.5l di-d 16v common rail diesel engine. This engine uses DENSO diesel injectors.
How Diesel Injectors Are Remanufactured
Watch our 3D walkthrough of the diesel injector remanufacturing process and see how injectors are professionally restored for reliable service.
Vehicles Using 4D56 16V Engine
| Vehicle | Engine | Years |
|---|---|---|
| Mitsubishi Challenger injector | 2.5 DI-D | 2008–2015 |
| Mitsubishi L200 / Triton (KB4T) injector | 2.5 DI-D | 2006–2015 |
| Mitsubishi Pajero Sport / Shogun Sport injector | 2.5 DI-D | 2008–2015 |
Common 4D56 16V Injector Problems
Rough idle and engine vibration
Worn injector nozzles cause uneven fuel spray, leading to rough idle at low RPM. Most noticeable when the engine is cold.
Excessive exhaust smoke
Black or blue-grey smoke on acceleration indicates poor fuel atomisation. This is often caused by carbon buildup on the injector nozzle tip.
Poor fuel economy
A worn or leaking injector delivers incorrect fuel quantities, reducing efficiency by 10–20% in severe cases.
Engine misfire under load
Intermittent misfires during acceleration suggest one or more injectors are failing to deliver the correct fuel pressure.
Difficult cold starting
Degraded injector nozzles struggle to atomise fuel at lower cranking pressures, causing extended crank times in cold weather.
Loss of power
Gradual power loss across the rev range, particularly above 2500 RPM, can indicate injector flow rate degradation.
Increased diesel knock
Louder than normal combustion noise, especially at idle, can indicate incorrect injection timing due to worn injector internals.
4D56 16V Technical Specifications
Displacement
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Power
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Torque
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Fuel System
Common Rail Direct Injection
The 4D56 16V is a 2.5l di-d 16v common rail diesel engine. This engine uses DENSO diesel injectors.
Engine Intelligence
Mitsubishi 2.5 DI-D common-rail (4D56 16v/HP — L200/Triton, Pajero Sport)
Documented failure modes
- Nozzle wear / clogging from contaminated fuel degrading atomisation — the documented main cause on this common-rail 4D56
- Injector internal leakage dragging rail pressure down
- Unregistered injector ID codes after replacement causing rough idle and noise
Diagnostic guidance
- Denso injectors carry an ID code — register the new code after fitting or the engine will idle rough
- Use a cylinder-balance test: minimal rpm change on one cylinder identifies the weak injector
- Check for external diesel leaks around the injector bases and lines
- Rule out SCV / rail-pressure control faults (P0088/P0089) before condemning injectors
Fitment note: The 4D56 family spans older rotary-pump engines and the later common-rail 16v/HP versions — only the common-rail generation uses these Denso injectors; match the reference etched on the injector body.