The Mitsubishi 4J11 is a 1,590 cc, inline‑four naturally aspirated petrol engine produced between 2010 and 2023. It features an aluminum alloy block with cast‑iron liners, DOHC 16‑valve architecture, and Mitsubishi’s MIVEC variable valve timing system on both intake and exhaust camshafts. In standard form it delivered 86–90 kW (117–122 PS), with torque figures between 154–157 Nm, offering responsive urban performance and improved fuel efficiency over its predecessor.
Fitted to models such as the ASX (GA), Outlander (GE/GG), and Lancer (CY/CS facelift), including the Eclipse Cross (GK), the 4J11 was engineered for compact SUVs and hatchbacks with a focus on emissions compliance and refinement. Emissions compliance was achieved through precise electronic throttle control, sequential multi‑point fuel injection, and a close‑coupled three‑way catalytic converter, meeting Euro 5 standards from launch and Euro 6 in later model years.
One documented concern is oil dilution in cold‑climate short‑trip use, linked to fuel condensation in the crankcase during incomplete warm‑up cycles. This issue was addressed in Mitsubishi Technical Service Bulletin TSB‑ME‑15‑009, which recommended revised engine warm‑up strategies and periodic oil level checks. From 2016 onward, updated piston ring tension and PCV calibration reduced fuel ingress into the oil sump.
Production years 2010–2014 meet Euro 5 standards; 2015–2023 models meet Euro 6 compliance depending on market (JAMA Type Approval #JAMA/EMS/4582).
The Mitsubishi 4J11 is a 1,590 cc inline‑four naturally aspirated petrol engine engineered for compact SUVs and hatchbacks (2010–2023). It combines DOHC 16‑valve architecture with dual MIVEC variable valve timing to deliver smooth power delivery and improved fuel economy over previous generations. Designed to meet Euro 5 and Euro 6 emissions standards, it balances everyday drivability with environmental compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,590 cc | |
| Fuel type | Petrol (Unleaded) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 75.0 mm × 90.0 mm | |
| Power output | 86–90 kW (117–122 PS) | |
| Torque | 154–157 Nm @ 4,000 rpm | |
| Fuel system | Sequential multi‑point fuel injection (SFI) | |
| Emissions standard | Euro 5 (2010–2014); Euro 6 (2015–2023) | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain (front‑mounted; maintenance‑free design) | |
| Oil type | Mitsubishi DiaQueen 0W‑20 (API SN/ILSAC GF‑5) | |
| Dry weight | 102 kg |
The dual MIVEC system provides smooth power delivery and improved fuel economy but requires adherence to 15,000 km oil change intervals using 0W‑20 low-viscosity oil to maintain valve train and chain longevity. Mitsubishi DiaQueen 0W‑20 (or equivalent API SN/GF‑5) is critical due to its shear stability and deposit control for the chain-driven DOHC system. In cold climates or short-trip driving, oil dilution may occur—inspect dipstick monthly and change oil early if level rises unexpectedly. Fuel injectors are sensitive to ethanol content; use E5 or lower to prevent coking. No major timing system failures are documented, but PCV system inspection is advised after 150,000 km.
Oil Specs: Requires Mitsubishi DiaQueen 0W‑20 or API SN/ILSAC GF‑5 equivalent (Mitsubishi Owner’s Manual ASX GA).
Emissions: Euro 5 certification applies to 2010–2014 models only (JAMA Type Approval #JAMA/EMS/4582). Euro 6 compliance confirmed for 2015–2023 builds.
Power Ratings: Measured under JIS D 1001 standards. 90 kW output requires RON 95 fuel (Mitsubishi TIS Doc. MIVEC‑4J11).
Mitsubishi Technical Information System (TIS): Docs MIVEC‑4J11, M14‑7723
JAMA Type Approval Database (JAMA/EMS/4582)
ISO 1585:1999 Road vehicles — Engine test code
The Mitsubishi 4J11 was used across Mitsubishi's GA/GE platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised intake manifolds in the Outlander GE and updated PCV routing in the Eclipse Cross GK—and from 2015 the Euro 6–compliant ASX GA models adopted lean-burn calibration, creating minor ECU interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crankshaft pulley (Mitsubishi TIS MIVEC‑4J11). The 7th VIN digit indicates engine family ('J' for 4J11 series). All units have dual MIVEC solenoids (intake and exhaust) and black cam covers. Critical differentiation from 4A92: 4J11 has longer stroke (90.0 mm vs 87.3 mm) and dual MIVEC. Service parts require production date verification—piston ring packs for engines before 01/2016 are incompatible with later units due to oil control groove redesign (Mitsubishi TSB ME‑15‑009).
The 4J11's primary reliability risk is oil dilution in cold‑climate short‑trip use, with elevated incidence in urban stop‑start driving below 10 °C. Mitsubishi internal quality reports from 2016 indicated a subset of pre‑2016 engines required early oil changes due to fuel contamination, while EU service records show minor MIVEC solenoid faults as a secondary concern. Extended oil change intervals and low‑quality fuel exacerbate sludge formation, making correct oil specification and driving habits critical.
Analysis derived from Mitsubishi technical bulletins (2015–2020) and EU national vehicle inspection failure statistics (2016–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MITSUBISHI 4J11.
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