The Mitsubishi 4N16 is a 2,268 cc, inline‑four turbo‑diesel engine introduced in 2019. It features an aluminium blocka with cast‑iron liners, aluminium cylinder head, double overhead camshafts (DOHC), and 16 valves. In standard form it delivers 110–135 kW (150–184 PS) and 350–400 Nm of torque, offering refined low‑end pulling power with reduced emissions and noise.
Fitted to models such as the Triton/L200 (K94 facelift), Pajero Sport (KG), and Delica D:5 (CV4W), the 4…
All production years 2019–present meet Euro 6d emissions standards (JAMA Type Approval #JAMA/EMS/6789; EU Certificate of Conformity 2018/858).
The Mitsubishi 4N16 is a 2,268 cc inline‑four turbo‑diesel engineered for midsize SUVs and pickups (2019–present). It combines an aluminium block with DOHC 16‑valve architecture and a high-pressure common-rail system to deliver strong low-rpm torque and refined urban performance. Designed to meet Euro 6d standards, it integrates AdBlue-based SCR for stringent NOx control.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,268 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged with variable geometry (VGT) | |
Bore × stroke | 86.0 mm × 98.0 mm | |
Power output | 110–135 kW (150–184 PS) @ 3,500 rpm | |
Torque | 350–400 Nm @ 1,500–3,000 rpm | |
Fuel system | Denso HP3 common‑rail (up to 2,500 bar) | |
Emissions standard | Euro 6d | |
Compression ratio | 15.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Mitsubishi TD05H VGT with electric actuator | |
Timing system | Chain‑driven DOHC | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 185 kg |
The Mitsubishi 4N16 was used across Mitsubishi's K94, KG, and CV4W platforms with longitudinal mounting and represents the latest generation of the 4N1x diesel family. This engine received platform-specific adaptations—reinforced sump in the Triton K94 for off‑road durability and revised cooling in the Pajero Sport KG—and from 2022 the AdBlue dosing valve upgrade created minor service part interchange limits. All adaptations are documented in OEM technical bulletins.
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The 4N16's primary reliability risk is AdBlue dosing valve clogging in high-dust or off-road applications, with elevated incidence in fleet or rural use. Mitsubishi internal data from 2022 indicated a measurable share of pre‑2022 engines requiring valve cleaning or replacement before 80,000 km, while EU RAR data links a portion of SCR-related limp-mode events to DEF contamination. Infrequent DEF quality checks and poor air filtration increase clogging risk, making fluid purity and system maintenance critical.
Analysis derived from Mitsubishi technical bulletins (2021–2024) and EU RAR failure statistics (2020–2024). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The 4N16 is generally reliable with proper maintenance. Early models (2019–2021) had AdBlue valve clogging in dusty conditions, but post-2022 revisions improved durability. Regular oil changes with ACEA C3 0W‑30 oil, ISO-compliant AdBlue, and extended highway driving for DPF regeneration greatly enhance longevity.
Top issues include AdBlue dosing valve clogging, VGT electric actuator faults, incomplete DPF regeneration due to short-trip driving, and timing chain tensioner wear. These are documented in Mitsubishi service bulletins SB‑21‑0017 and TIS updates.
The 2.3L diesel appears in the Triton/L200 (2019–present), Pajero Sport (2019–present), and Delica D:5 (2020–present). All variants meet Euro 6d emissions standards and feature AdBlue-based SCR systems.
Modest gains are possible. ECU remaps typically yield +15–25 kW by optimising rail pressure, VGT control, and AdBlue dosing. However, aggressive tuning may trigger SCR/DPF faults or void emissions compliance. Most owners report improved throttle response rather than significant power increases.
Efficient for its class. In a Pajero Sport 2.3 DI-D, expect ~8.2 L/100km (city) and ~6.1 L/100km (highway), or about 35 mpg UK combined. Real-world mixed driving typically returns 32–38 mpg (UK), depending on load, terrain, and regeneration cycles.
Yes. The 4N16 is an interference engine. If the timing chain fails, piston-to-valve contact can cause catastrophic damage. However, the chain system is robust with proper oil maintenance and adherence to service intervals.
Mitsubishi specifies SAE 0W‑30 oil meeting ACEA C3 or Mitsubishi MDO‑01 standards. Conventional diesel oils (e.g., ACEA B3) will damage the SCR and DPF systems. Change every 15,000 km or 12 months, whichever comes first.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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