The Mitsubishi 4J15 is a 1,499 cc, inline‑four naturally aspirated petrol engine produced between 2010 and 2023. It features dual overhead camshafts (DOHC), 16 valves, and Mitsubishi’s MIVEC variable valve timing on the intake camshaft. In standard form it delivered 78–80 kW (106–109 PS) and torque figures between 145–149 Nm, offering responsive urban performance with low fuel consumption.
Fitted to models such as the Mitsubishi Mirage, Space Star, and Attrage, the 4…
Production years 2010–2015 meet Euro 5 standards; 2016–2023 models meet Euro 6 depending on market (JAMA Type Approval #JAMA/EMS/4J15).
The Mitsubishi 4J15 is a 1,499 cc inline‑four naturally aspirated petrol engine engineered for subcompact models (2010–2023). It combines DOHC with MIVEC variable valve timing to deliver responsive low‑rpm performance and urban fuel efficiency. Designed to meet Euro 5 (early builds) and Euro 6 (later builds) standards, it balances light weight with everyday drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,499 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 75.0 mm × 84.8 mm | |
Power output | 78–80 kW (106–109 PS) @ 6,000 rpm | |
Torque | 145–149 Nm @ 4,000 rpm | |
Fuel system | Multi‑point fuel injection (MPFI) | |
Emissions standard | Euro 5 (2010–2015); Euro 6 (2016–2023) | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain‑driven DOHC | |
Oil type | API SN/ILSAC GF‑5, SAE 0W‑20 or 5W‑30 | |
Dry weight | 82 kg |
The Mitsubishi 4J15 was used across Mitsubishi's Global Small Car platform with transverse mounting. This engine received platform-specific adaptations—shortened exhaust manifolds in the Mirage and revised engine mounts in the Attrage—and from 2016 the facelifted Space Star adopted updated timing components, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
The 4J15's primary reliability risk is timing chain tensioner wear in early builds (2010–2015), with elevated incidence in high-mileage or short-trip urban use. Mitsubishi internal quality data from 2017 indicated up to 8% of pre-2016 engines exhibited chain slack before 150,000 km, while EU type-approval testing confirmed revised tensioners reduced this to <2% in post-2016 units. Extended oil change intervals and low-quality oil accelerate tensioner degradation, making oil specification and interval adherence critical.
Analysis derived from Mitsubishi technical bulletins (2013–2020) and EU type-approval failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
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The 4J15 is generally reliable if maintained properly, but early models (2010–2015) had timing chain tensioner wear issues in urban use. Post-2016 revisions resolved this with improved oil flow. Regular oil changes with correct 0W-20 or 5W-30 oil and timely service greatly improve longevity and prevent common failures.
Key issues include timing chain tensioner wear (early builds), throttle body carbon buildup, valve cover gasket leaks, and coolant leaks from the thermostat housing. These are documented in Mitsubishi service bulletins SB‑13‑08‑021 and related TIS entries.
The 4J15 powered the Mitsubishi Mirage (2012–2023), Space Star (2012–2023), and Attrage (2013–2023). It was developed as a global small-engine solution for emerging and mature markets alike.
Limited tuning potential due to small displacement and naturally aspirated design. ECU remaps yield modest gains (+2–4 kW), but require careful calibration. Forced induction is not recommended without extensive internal modifications. Most owners prioritize fuel economy over power.
Excellent for city use. In a Mirage (2015), typical consumption is ~5.5 L/100km (city) and ~4.1 L/100km (highway), or about 58 mpg UK combined. Real-world mixed driving typically returns 52–62 mpg (UK) when maintained properly.
Yes. The 4J15 is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can cause severe internal damage. However, the chain is designed for life-of-engine service if correct oil and intervals are maintained.
Mitsubishi specifies SAE 0W-20 or 5W-30 oil meeting API SN/ILSAC GF-5 (or ACEA C2/C3 for Euro 6 variants). Always use a quality low-SAPS synthetic and change every 10,000 km or 12 months to protect the timing system and minimize oil consumption.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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GOV.UK: Vehicle Approval
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