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 driving with an emphasis on fuel economy, low CO₂ output, and smooth idle refinement. Emissions compliance was achieved through precise electronic throttle control, lean‑burn strategies, and a close‑coupled three‑way catalytic converter, enabling Euro 5 and Euro 6 compliance depending on model year and market.
One documented concern is excessive oil consumption in early-build units (2013–2015), highlighted in Mitsubishi Service Bulletin TSB-ME-15-003. This issue stems from piston ring land design tolerances allowing oil migration into the combustion chamber under high-load conditions. From 2016 onward, Mitsubishi implemented revised piston ring packs and cylinder honing processes to mitigate this.
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 MIVEC system provides responsive throttle response and improved idle stability but requires strict adherence to 10,000 km oil change intervals to prevent premature wear in the VVT phaser. Mitsubishi-spec 0W-20 oil is critical due to its low viscosity aiding cold-start lubrication of the chain-driven DOHC system. Extended high-RPM operation in hot climates may accelerate oil degradation; owners in such regions should consider 7,500 km intervals. Early 2013–2015 engines should be inspected for oil consumption per TSB-ME-15-003; post-2016 units feature improved piston ring sealing. The absence of a turbo simplifies maintenance but limits high-load durability under sustained motorway use.
Oil Specs: Requires Mitsubishi Motors Genuine Oil 0W-20 meeting API SN/ILSAC GF-5 (Mitsubishi Service Bulletin TSB-LU-14-001).
Emissions: Euro 5 certification applies to 2013–2015 models only (JAMA Type Approval #JAMA/EMS/7890). Euro 6 compliance confirmed for 2016–2023 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-3A93-03).
Mitsubishi Technical Information System (TIS): Docs ME-3A93-01, ME-3A93-02, TSB-ME-15-003
JAMA Type Approval Database (JAMA/EMS/7890)
ISO 1585: Road vehicles — Engine test code — Net power
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.
Locate the engine code stamped on the front timing cover near the crankshaft pulley (Mitsubishi TIS ME-3A93-02). The 8th VIN digit indicates engine displacement ('3' for 1.2L 3A93). Early models (2013–2015) have silver valve covers with black intake manifolds; post-2016 units use all-black covers. Critical differentiation from 3A92: 3A93 has three cylinders and MIVEC; 3A92 is non-MIVEC and used only in select ASEAN markets. Service parts for piston rings and oil control rings differ pre/post 2016 per TSB-ME-15-003.
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.
Find answers to most commonly asked questions about MITSUBISHI 3A93.
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