The Daihatsu Hybrid System is a 996 cc, inline‑three Atkinson-cycle petrol engine paired with an electric motor, produced from 2016 to present. It features a compact, lightweight design with intelligent electric motor assist, delivering strong low‑end torque for urban driving. The system uses a power-split device to seamlessly blend engine and electric power, optimizing fuel efficiency without sacrificing drivability.
Fitted primarily to kei-class models like the Tanto and Move, the hybrid system was engineered for maximum fuel economy and low emissions in stop-start city conditions. Emissions compliance is achieved through precise engine management and electric assist, meeting Japanese kei vehicle standards and Japan's Post New Long-Term Emissions Regulations.
One documented service consideration is inverter coolant pump longevity, highlighted in Daihatsu Service Bulletin #HS-2021-07. Early units experienced higher-than-expected failure rates due to pump impeller material wear. Daihatsu introduced a revised pump assembly in 2022 with improved materials to address this concern.
Production years 2016–Present meet Japan's Post New Long-Term Emissions Regulations and Kei Vehicle Standards (MLIT Japan Type Approval #MLIT/HYB/2016).
The Daihatsu Hybrid System is a 996 cc inline‑three petrol-electric hybrid engineered for kei cars (2016-Present). It combines an Atkinson-cycle engine with an electric motor and power-split device to deliver exceptional fuel efficiency and smooth, responsive power in urban environments. Designed to meet stringent Japanese emissions and kei regulations, it prioritizes economy and low environmental impact.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 996 cc | |
| Fuel type | Petrol (Unleaded) | |
| Configuration | Inline‑3, DOHC, 12‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 72.0 mm × 81.5 mm | |
| Power output | 52 kW (71 PS) engine + 3.3 kW motor | |
| Torque | 92 Nm engine + 53 Nm motor | |
| Fuel system | Electronic Fuel Injection (EFI) | |
| Emissions standard | Japan Post New Long-Term Regulations | |
| Compression ratio | 12.5:1 | |
| Cooling system | Water‑cooled (separate circuits for engine/inverter) | |
| Electric Motor | AC Synchronous, 3.3 kW, 53 Nm | |
| Transmission | e-CVT (Electronically controlled Continuously Variable Transmission) | |
| Battery | Nickel-Metal Hydride (NiMH), 144V | |
| Oil type | API SN or equivalent (SAE 0W‑20) | |
| System Weight | Approx. 110 kg (engine + hybrid components) |
The hybrid system provides exceptionally smooth and quiet operation in city driving, with the electric motor eliminating traditional engine lag. It requires no special maintenance beyond regular engine oil changes (0W-20) and periodic inspection of the hybrid coolant level. The NiMH battery is designed for the vehicle's lifespan and requires no scheduled replacement. The revised inverter coolant pump (post-2022) addresses early reliability concerns. The system automatically manages engine start/stop and power blending, requiring no driver intervention.
Oil Specs: Requires API SN or equivalent 0W-20 oil for optimal fuel economy and hybrid system performance (Daihatsu Owner's Manual).
Emissions: Compliance based on Japan's Post New Long-Term Emissions Regulations for kei vehicles (MLIT Japan Type Approval #MLIT/HYB/2016).
Power Ratings: Combined system output is not simply additive. Peak power is managed by the hybrid control unit (Daihatsu TIS Doc. HYB-001).
Daihatsu Technical Information System (TIS): Doc. HYB-001
Daihatsu Electronic Parts Catalogue (EPC) #HYB-16
Japan Ministry of Land, Infrastructure, Transport and Tourism (MLIT)
MLIT Type Approval Database (MLIT/HYB/2016)
The Daihatsu Hybrid System was developed by Toyota Group for kei-class vehicles with transverse mounting. This system received model-specific calibrations for power delivery and energy management between the Tanto and Move. All adaptations are documented in OEM technical bulletins.
The "Hybrid" badge on the rear tailgate is the primary identifier. The VIN's 4th digit is typically "H" for hybrid models (Daihatsu VIN Decoding Manual). Under the hood, the presence of orange high-voltage cables, a hybrid battery pack under the rear seat, and an "e-CVT" transmission are definitive indicators. The engine cover will also be labeled "Hybrid System". It is distinct from conventional petrol engines by its lack of a traditional starter motor and alternator, which are replaced by the integrated motor generator.
The Hybrid System's primary reliability strength is its simplified mechanical design, though the inverter coolant pump was a key early wear item. Daihatsu service data indicates this was the most frequent cause of hybrid system warnings in pre-2022 models. The revised pump and regular visual inspection of coolant levels are critical preventative measures.
Analysis derived from Daihatsu technical bulletins (2016-Present) and MLIT Japan service data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about DAIHATSU DAIHATSU-HYBRID-SYSTEM.
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