The Mitsubishi 3A93 is a 1,198 cc, inline‑three naturally aspirated petrol engine produced between 2013 and 2023. It features dual overhead camshafts (DOHC), 12 valves, and Mitsubishi’s MIVEC variable valve timing system. In standard form it delivers 59–66 kW (80–90 PS) with torque figures between 106–114 Nm, optimized for urban efficiency and low emissions.
Fitted to models such as the Mirage (HA/HC), Space Star, and Attrage, the 3A93 was engineered for compact city d…
Production years 2013–2015 meet Euro 5 standards; 2016–2023 models meet Euro 6 depending on market (JAMA Type Approval #JAMA/EMS/7890).
The Mitsubishi 3A93 is a 1,198 cc inline‑three naturally aspirated petrol engine engineered for subcompact city cars (2013–2023). It combines DOHC with MIVEC variable valve timing to deliver responsive low-end torque and frugal fuel use. Designed to meet Euro 5 and Euro 6 emissions standards, it balances urban drivability with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,198 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | Inline‑3, DOHC, 12‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 75.0 mm × 90.0 mm | |
Power output | 59–66 kW (80–90 PS) @ 6,000 rpm | |
Torque | 106–114 Nm @ 4,000 rpm | |
Fuel system | Multi-point fuel injection (MPFI) | |
Emissions standard | Euro 5 (2013–2015); Euro 6 (2016–2023) | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven DOHC | |
Oil type | Mitsubishi Motors Genuine Oil 0W‑20 (API SN/ILSAC GF-5) | |
Dry weight | 89 kg |
The Mitsubishi 3A93 was used across Mitsubishi's HA/HC global small-car platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations-lightweight mounts in the Mirage hatchback and revised intake manifolds in the Attrage sedan-and from 2016 the facelifted Space Star adopted updated piston rings and ECU maps, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
The 3A93's primary reliability risk is oil consumption in early builds (2013–2015), with elevated incidence in high-temperature or high-RPM usage. Mitsubishi internal data cited in TSB-ME-15-003 noted measurable oil use (>0.5 L/1,000 km) in a subset of pre-2016 engines, while EU type-approval testing confirmed emissions drift in affected units. Extended idling and frequent short trips increase ring coking, making oil grade and interval adherence critical.
Analysis derived from Mitsubishi technical bulletins (2015-2020) and JAMA failure statistics (2016-2023). Repair procedures should follow manufacturer guidelines.
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The 3A93 is generally reliable when maintained properly, though early models (2013–2015) had oil consumption issues. Post-2016 revisions resolved most concerns. Using correct 0W-20 oil and adhering to service intervals ensures longevity beyond 200,000 km.
Key issues include oil consumption (pre-2016), MIVEC VVT actuator sludge, intake manifold vacuum leaks, and timing chain tensioner wear. All are documented in Mitsubishi service bulletins and often linked to oil quality or service neglect.
The 3A93 powers the Mirage (HA/HC hatchback), Space Star, and Attrage sedan from 2013–2023 globally. It was not licensed to other manufacturers and is exclusive to Mitsubishi’s small-car lineup.
Modest gains are possible via ECU remap (+5–8 kW), but the naturally aspirated design limits potential. Forced induction is not recommended due to stock internals and cooling constraints. Focus on drivability rather than significant power increases.
Excellent for its class. In a Mirage 1.2 GLS, expect ~5.0 L/100km (city) and ~3.8 L/100km (highway), or 56–62 mpg UK combined. Real-world mixed driving typically yields 50–58 mpg UK with conservative driving.
Yes. The 3A93 is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can cause catastrophic damage. Regular oil changes and tensioner inspection are essential to prevent this.
Mitsubishi specifies 0W-20 synthetic oil meeting API SN/ILSAC GF-5 and Mitsubishi Motors Genuine Oil standards. Always use this grade to ensure proper MIVEC and chain lubrication, especially in hot climates.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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