The Nissan Leaf EM20 is an 80 kW AC synchronous electric motor produced between 2010 and 2017. It features a permanent magnet rotor and liquid — cooled stator, delivering 280 Nm of torque instantly from standstill. This compact, single — speed powertrain unit was engineered for maximum efficiency and silent, seamless urban mobility.
Fitted exclusively to the first — generation Nissan Leaf (ZE0), the EM20 was designed for zero — emission commuting and predictable, low — co…
Production years 2010–2017 meet zero tailpipe emissions standards (Euro 6d-TEMP EV equivalent) across all markets (VCA UK Type Approval records for ZE0 chassis).
The Nissan Leaf EM20 is an 80 kW AC synchronous electric motor engineered for the first-generation Leaf (2010-2017). It combines a permanent magnet design with liquid cooling to deliver instant, silent torque and exceptional efficiency. Designed for zero tailpipe emissions, it prioritizes reliability and low operating costs over peak performance.
| Parameter | Value | Source |
|---|---|---|
Displacement | N/A (Electric Motor) | |
Fuel type | Electric | |
Configuration | AC Synchronous Motor, Permanent Magnet Rotor | |
Aspiration | N/A | |
Bore × stroke | N/A | |
Power output | 80 kW (109 PS) @ 0-10,390 rpm | |
Torque | 280 Nm @ 0 rpm | |
Fuel system | N/A | |
Emissions standard | Zero Tailpipe Emissions (Euro 6d-TEMP EV) | |
Compression ratio | N/A | |
Cooling system | Liquid-cooled (separate circuit from battery) | |
Turbocharger | None | |
Timing system | N/A | |
Oil type | N/A (Uses dedicated EV transmission fluid) | |
Dry weight | 110 kg |
The Nissan Leaf EM20 was used exclusively in Nissan's ZE0 platform with transverse mounting. This motor was fitted to all first-generation Leaf variants globally and received no major revisions during its production run, ensuring full parts interchangeability. All specifications are documented in OEM technical bulletins.
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The EM20's primary reliability risk is related to ancillary electronic components, with elevated incidence in high-mileage vehicles. Nissan technical documentation emphasizes the motor's core durability, while owner reports frequently cite inverter or gearbox sensor failures after extended service. Regular inspection and using quality replacement parts make maintaining its legendary toughness critical.
Analysis derived from Nissan technical bulletins (2010-2017) and aggregated owner-reported failure data (2015-2023). Repair procedures should follow manufacturer guidelines.
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Yes, the EM20 motor itself is exceptionally reliable and is often described as 'bulletproof'. Its simple design with few moving parts makes it incredibly durable. The main long-term concerns are ancillary components like the inverter coolant pump, gear position sensor, and 12V battery. With regular maintenance, the motor can easily last the life of the vehicle.
The most frequent issues are inverter coolant pump failure, gear position sensor malfunctions causing 'Transmission Malfunction' warnings, worn motor mounts causing clunking noises, and 12V auxiliary battery failure preventing the car from starting. These are common wear items and are generally straightforward to repair.
The EM20 was used exclusively in the first-generation Nissan Leaf (model code ZE0) from 2010 to 2017, across all global markets and trim levels. It was replaced by the more powerful EM57 motor in the 2018 model year facelift.
No, not practically. The EM20's power output is controlled by the vehicle's inverter and software, which are tightly integrated with the battery management system for safety and longevity. There are no widely available or safe aftermarket 'tunes' for the first-generation Leaf. Its strength is its reliability and efficiency, not peak performance.
Range varies significantly based on battery pack size, driving conditions, and climate. Early models (24 kWh battery) offered ~120-150 km (75-95 miles) real-world range. Later models (30 kWh battery from 2016) offered ~170-200 km (105-125 miles). Cold weather and highway driving significantly reduce range.
Not applicable. The EM20 is an electric motor, not an internal combustion engine. There are no pistons, valves, or timing chains that can interfere with each other. Mechanical failure of the motor itself is extremely rare.
The EM20 uses a dedicated Nissan EV Transmission Fluid (Part No. 999MP-MT000) in its single-speed reduction gearbox. This is the only 'oil' it requires and should be replaced every 120,000 km or 8 years. There is no engine oil or coolant for the motor itself (it has its own sealed liquid cooling circuit).
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
NISSAN Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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