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…
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 | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 245 kg |
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.
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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.
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The 4M41 is exceptionally robust for off-road and towing when maintained properly, though pre-2008 models are prone to HPFP failure. Post-2008 revisions significantly improved fuel system durability. Using EN 590-compliant diesel and 5W-30 oil ensures longevity beyond 300,000 km.
Key issues include HPFP failure (pre-2008), EGR cooler leaks, turbo oil seal degradation, and glow plug controller faults. All are documented in Mitsubishi service bulletins and linked to fuel quality, thermal stress, or environmental exposure.
The 4M41 powered the Pajero/Montero (V60/V70, 2000–2015), Pajero Sport (K90, 2008–2015), and Delica D:5 (2007–2015) globally. It was used exclusively by Mitsubishi in heavy-duty SUV applications and was not licensed to other manufacturers.
Aftermarket ECU tuning is common on the 4M41 platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Typical for a 3.2L diesel SUV. In a Pajero 3.2 DI-D, expect ~10.5 L/100km (city) and ~7.8 L/100km (highway), or 27–36 mpg UK combined. Real-world mixed driving typically yields 30–34 mpg UK with conservative driving.
No. The 4M41 uses a chain-driven DOHC system but is a non-interference engine. If timing components fail, piston-to-valve contact will not occur, preventing catastrophic damage.
Mitsubishi specifies 5W-30 synthetic oil meeting API CJ-4/ACEA E7 standards. Always use this grade to ensure proper lubrication of the HPFP, turbo, and valvetrain, especially under high-load conditions.
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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