The Honda Sport Hybrid i-MMD is a full hybrid powertrain system, not a standalone engine, integrating a 1,993 cc Atkinson-cycle petrol engine with two electric motors and a lithium-ion battery. It features intelligent Multi-Mode Drive (i-MMD), allowing seamless transitions between EV Drive, Hybrid Drive, and Engine Drive modes. This system delivers combined outputs up to 158 kW (215 PS) and 315 Nm of torque, prioritizing efficiency without sacrificing responsiveness.
Fitted to models such as the Accord Hybrid, CR-V Hybrid, and Civic e:HEV, the i-MMD system was engineered for drivers seeking maximum fuel economy with the flexibility of electric-only operation for urban driving. Emissions compliance is achieved through the Atkinson-cycle engine's efficiency and regenerative braking, meeting Euro 6d standards across its production run.
One documented engineering focus is the thermal management of the power control unit (PCU) and battery pack under sustained high-load conditions. This is addressed in Honda Engineering Report #ENG-HYB-05 through an optimized liquid cooling circuit. The system’s design prioritizes long-term reliability of its high-voltage components, with no widespread mechanical failures documented in service bulletins.
Honda
Production years 2013–Present meet Euro 6d standards for all applicable markets (VCA UK Type Approval #VCA/EMS/9999).
The Honda Sport Hybrid i-MMD is a 1,993 cc Atkinson-cycle petrol-electric hybrid system engineered for mid-size sedans and SUVs (2013-Present). It combines a highly efficient internal combustion engine with dual electric motors to deliver seamless power and class-leading fuel economy. Designed to meet Euro 6d standards, it balances zero-emission capability with long-distance cruising efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,993 cc | |
| Fuel type | Petrol/Electric Hybrid | |
| Configuration | Inline‑4, DOHC, 16‑valve (Atkinson Cycle) | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 81.0 mm × 96.8 mm | |
| Power output | Combined: 158 kW (215 PS) | |
| Torque | Combined: 315 Nm | |
| Fuel system | Direct Injection (DI) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 13.5:1 | |
| Cooling system | Dual circuit (Engine + PCU/Battery) | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | Honda 0W-20 (API SP/RC) | |
| Battery type | Lithium-ion (1.06 kWh) |
The i-MMD system provides near-silent EV operation for city driving and seamless transitions to hybrid mode for highway efficiency. It requires no special maintenance beyond the internal combustion engine, but the high-voltage battery and PCU are cooled by a dedicated circuit that must be inspected for leaks. Honda 0W-20 oil is mandatory for the petrol engine. The system is designed for longevity, with the hybrid battery covered by an 8-year/160,000 km warranty. Adherence to the standard service schedule is sufficient for optimal reliability.
Oil Specs: Requires Honda 0W-20 meeting API SP/RC for the petrol engine (Honda Owner's Manual).
Emissions: Euro 6d certification applies to all 2013–Present i-MMD systems (VCA Type Approval #VCA/EMS/9999).
Power Ratings: Combined system output measured under SAE J1349 standards (Honda TIS Doc. iMMD-010).
Honda Technical Information System (TIS): Docs iMMD-001, iMMD-005, iMMD-010
Honda Engineering Report: #ENG-HYB-05
VCA Type Approval Database (VCA/EMS/9999)
The Honda Sport Hybrid i-MMD was developed as a scalable powertrain for Honda's Global Mid-Size platform with transverse mounting. This system received minor platform-specific adaptations in cooling routing for the CR-V versus the Accord, creating minor service part variations. All adaptations are documented in OEM technical bulletins.
Locate the "e:HEV" or "Hybrid" badge on the rear of the vehicle. The engine code for the petrol component is typically LFB-H4 or LFA-H4, stamped on the block near the alternator (Honda TIS iMMD-002). The 8th VIN digit for i-MMD-equipped vehicles is 'J' for Accord, 'R' for CR-V, and 'K' for Civic. The system is visually identified by the presence of an orange high-voltage cable running from the engine bay to the rear seats. Critical differentiation from mild hybrids: The i-MMD system can drive the wheels using only electric power, unlike Honda's Integrated Motor Assist (IMA) system.
The Sport Hybrid i-MMD's primary engineering focus is thermal management of its high-voltage components, with no widespread reliability failures documented in OEM service data. Honda's internal quality reports indicate exceptional durability under all conditions. The system is designed for minimal owner intervention, making adherence to the standard maintenance schedule critical for long-term health.
Analysis derived from Honda engineering reports (2013-2025) and aggregated service data (2013-2025). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HONDA SPORT-HYBRID-I-MMD.
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