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 4N16 was engineered to replace the 4N15 with improved thermal efficiency, lower NVH, and enhanced Euro 6d compliance. Emissions compliance is achieved through a high-pressure common‑rail system, variable geometry turbocharging, cooled exhaust gas recirculation, and a diesel oxidation catalyst combined with a selective catalytic reduction (SCR) system using AdBlue.
One documented concern is occasional AdBlue dosing valve clogging in high‑dust environments, highlighted in Mitsubishi Service Bulletin SB‑21‑0017. This issue stems from particulate ingress during off‑road operation and is exacerbated by infrequent DEF quality checks. From 2022, Mitsubishi revised the dosing valve filter screen and updated DEF maintenance guidance to mitigate the risk.
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 | Mitsubishi Diesel MDO‑01 or ACEA C3 (SAE 0W‑30) | |
| Dry weight | 185 kg |
The aluminium-block design reduces weight while maintaining durability, but requires strict adherence to 15,000 km oil change intervals using low-SAPS ACEA C3 or Mitsubishi MDO‑01 oil to protect after-treatment systems. The Denso HP3 fuel system demands ultra-low-sulfur diesel (EN 590) to prevent injector wear. AdBlue quality must be ISO 22241‑1 compliant; contamination or dilution triggers SCR faults and limp mode. The VGT turbo uses an electric actuator for precise boost control but is sensitive to voltage fluctuations—battery health should be monitored. Post-2022 models include a revised AdBlue dosing valve per SB‑21‑0017 to reduce clogging in dusty conditions.
Oil Specs: Requires ACEA C3 or Mitsubishi MDO‑01 (0W‑30) specification (Mitsubishi PT‑2023). Not compatible with ACEA B3/B4 or API CJ-4 oils.
Emissions: Euro 6d certification applies to all 2019–present models (EU Certificate of Conformity 2018/858).
Power Ratings: Measured under ISO 1585 standards. Output varies by ECU calibration and market (Mitsubishi PT‑2023).
Mitsubishi Technical Information System (TIS): Docs M3016, M3050, SB‑21‑0017
EU Certificate of Conformity 2018/858
ISO 1585:1999 Road vehicles — Engine test code
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.
Locate the engine code stamped on the front face of the cylinder block near the timing cover (Mitsubishi TIS M3040). The 7th VIN digit indicates engine family ('6' for 4N16 series). All 4N16 units feature an aluminium block, DOHC head, and AdBlue dosing module mounted on the exhaust manifold. Critical differentiation from 4N15: 4N16 has 86.0 mm bore (vs 85.0 mm) and unique turbo actuator connector. Service parts require production date verification—AdBlue dosing valves before 05/2022 use a finer mesh screen prone to clogging in dusty environments (Mitsubishi SB‑21‑0017).
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.
Find answers to most commonly asked questions about MITSUBISHI 4N16.
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