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-cost ownership. Emissions compliance is inherent (zero tailpipe emissions), meeting Euro 6d-TEMP equivalent standards for electric vehicles throughout its production run.
One documented generational update is the introduction of the more powerful EM57 motor in 2013 for certain markets, which offered increased power and efficiency. The EM20, detailed in Nissan Technical Bulletin NTB10-005, established the core architecture for Nissan's global EV platform, focusing on reliability and serviceability.
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 EM20 delivers instant, silent torque ideal for city driving and requires minimal maintenance. There is no engine oil, timing belt, or spark plugs. The primary service item is the dedicated transmission fluid, which should be replaced every 120,000 km or 8 years per Nissan TIS. The liquid cooling system for the motor is generally very reliable but should be inspected for leaks. Regenerative braking significantly reduces wear on friction brakes.
Oil Specs: Uses Nissan EV Transmission Fluid (Part No. 999MP-MT000) (Nissan Service Manual SM-EV-10).
Emissions: Zero tailpipe emissions certified for all model years (VCA Type Approval for ZE0).
Power Ratings: Measured under SAE J1996 standards for electric motors (Nissan Group PT-2012).
Nissan Technical Information System (TIS): Manuals SM-EV-10, SM-EV-15
Nissan Technical Bulletins: NTB10-005
SAE International: J1996 Electric Vehicle Powertrain Standards
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.
The EM20 motor is not typically identified by a stamped code like an ICE. It is integrated into the front axle assembly. The 8th VIN digit for the ZE0 Leaf is 'Z', indicating an electric vehicle. Visually, it is a compact, cylindrical motor mounted transversely at the front of the vehicle, connected directly to a single-speed reduction gearbox. Critical differentiation from EM57: The EM20 is found only in 2010-2017 ZE0 models; the EM57 was introduced in the 2018+ AZE0 facelift. Electrical connectors and inverter part numbers are specific to the EM20.
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.
Find answers to most commonly asked questions about NISSAN LEAF-EM20.
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