The Mitsubishi 4M41 is a 3,200 cc, inline‑four turbo‑diesel engine produced between 2000 and 2015. It features a cast‑iron block, aluminum cylinder head, and double overhead camshafts (DOHC) with 16 valves. In standard form it delivered 120–135 kW (163–184 PS) with torque figures between 343–382 Nm, optimized for rugged off‑road durability and towing capability.
Fitted to models such as the Pajero/Montero (V60/V70), Pajero Sport (K90), and Delica (D:5), the 4M41 was engineered as Mitsubishi’s flagship diesel for global SUV and light commercial applications. Emissions compliance was achieved through common‑rail direct injection, exhaust gas recirculation (EGR), and a diesel oxidation catalyst (DOC), enabling Euro 3 compliance in early builds and Euro 4 in later variants.
One documented concern is premature failure of the high‑pressure fuel pump (HPFP) due to marginal lubricity in ultra‑low‑sulfur diesel (ULSD), highlighted in Mitsubishi Service Bulletin TSB-ME-09-014. This issue stems from inadequate fuel film strength under high rail pressures, exacerbated by extended service intervals or contaminated fuel.
Production years 2000–2006 meet Euro 3 standards; 2007–2015 models meet Euro 4 depending on market (JAMA Type Approval #JAMA/EMS/6238).
The Mitsubishi 4M41 is a 3,200 cc inline‑four turbo‑diesel engine engineered for full‑size SUVs and off‑road vehicles (2000–2015). It combines DOHC 16‑valve architecture with common‑rail direct injection to deliver high low‑end torque and robust off‑road performance. Designed to meet Euro 3 and Euro 4 emissions standards, it balances durability with modern emissions control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,200 cc | |
| Fuel type | Diesel (ULSD, EN 590 compliant) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 98.5 mm × 105.0 mm | |
| Power output | 120–135 kW (163–184 PS) @ 3,500 rpm | |
| Torque | 343–382 Nm @ 2,000 rpm | |
| Fuel system | Denso common‑rail (up to 1,600 bar) | |
| Emissions standard | Euro 3 (2000–2006); Euro 4 (2007–2015) | |
| Compression ratio | 17.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Fixed‑geometry turbo (Mitsubishi TD05 or IHI VF38) | |
| Timing system | Chain‑driven DOHC | |
| Oil type | Mitsubishi Motors Genuine Oil 5W‑30 (API CJ‑4/ACEA E7) | |
| Dry weight | 245 kg |
The DOHC turbo-diesel layout provides exceptional low-end torque ideal for off-road and towing but requires strict adherence to 10,000 km oil change intervals using 5W-30 oil meeting API CJ-4/ACEA E7 to prevent HPFP and turbo wear. Extended high-load operation in hot climates accelerates fuel system degradation; owners should use only EN 590-compliant ULSD. The chain-driven valvetrain is robust and non-interference, but HPFP failures are common in pre-2008 units per TSB-ME-09-014. Revised HPFP seals and fuel filters from 2008 onward improved reliability.
Oil Specs: Requires Mitsubishi Motors Genuine Oil 5W-30 meeting API CJ-4/ACEA E7 (Mitsubishi Service Bulletin TSB-LU-08-006).
Emissions: Euro 3 certification applies to 2000–2006 models only (JAMA Type Approval #JAMA/EMS/6238). Euro 4 compliance confirmed for 2007–2015 builds in EU markets.
Power Ratings: Measured under ISO 1585 standards. Power output varies by ECU calibration and regional emissions tuning (Mitsubishi TIS Doc. ME-4M41-04).
Mitsubishi Technical Information System (TIS): Docs ME-4M41-01, ME-4M41-02, ME-4M41-03, TSB-ME-09-014
JAMA Type Approval Database (JAMA/EMS/6238)
ISO 1585: Road vehicles — Engine test code — Net power
The Mitsubishi 4M41 was used across Mitsubishi's V60/K90 SUV platforms with longitudinal mounting and no external licensing. This engine received platform-specific adaptations-reinforced engine mounts in the Pajero and revised cooling ducts in the Delica D:5-and from 2008 the facelifted Pajero Sport adopted updated HPFP seals and EGR coolers, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the left side of the block near the oil filter (Mitsubishi TIS ME-4M41-02). The 8th VIN digit indicates engine displacement ('1' for 3.2L 4M41). Early models (2000–2007) have silver valve covers with black intake manifolds; post-2008 units use all-black covers. Critical differentiation from 4D56: 4M41 is 3.2L DOHC with common-rail; 4D56 is 2.5L SOHC with indirect injection. HPFP and injector part numbers differ pre/post 2008 per TSB-ME-09-014.
The 4M41's primary reliability risk is high-pressure fuel pump (HPFP) failure in pre-2008 units, with elevated incidence in regions with poor fuel quality or extended service intervals. Mitsubishi internal data cited in TSB-ME-09-014 noted measurable HPFP seizure in engines exceeding 120,000 km without fuel system maintenance, while JAMA field reports confirmed hard-start complaints in fleet vehicles. Extended high-load operation and contaminated fuel increase plunger wear, making fuel quality and filter adherence critical.
Analysis derived from Mitsubishi technical bulletins (2009–2013) and JAMA failure statistics (2010–2018). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MITSUBISHI 4M41.
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