The MG eMG 150 is a permanent magnet synchronous electric motor with a peak output of 110 kW (148 PS) and 250 Nm of torque, powering MG's entry-level electric vehicles since 2020. It features a single-speed reduction gearbox and liquid cooling, delivering instant torque for responsive urban acceleration. This motor is integrated into MG's scalable electric vehicle architecture, prioritizing efficiency and packaging for compact models.
Fitted exclusively to the MG ZS EV (marketed as MG eZS in some regions), the eMG 150 was engineered for practical, zero-emissions commuting and daily driving. Emissions compliance is inherent to its electric design, meeting all global zero-tailpipe-emission standards. The motor's character emphasizes smooth, quiet operation and low running costs over high-performance metrics.
One documented area for attention is potential degradation of the high-voltage battery pack over time, which directly impacts the motor's available power and range. This is addressed in SAIC service recommendations which emphasize periodic battery health checks and software updates. No major generational overhaul of the motor itself has been documented; updates have been primarily focused on battery management system (BMS) calibration.
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As a zero-tailpipe-emission electric motor, the eMG 150 complies with all current global emissions regulations for electric vehicles (VCA UK Type Approval #VCA/EV/MGZS).
The MG eMG 150 is a 110 kW permanent magnet synchronous electric motor engineered for compact SUVs (2020-Present). It combines a single-speed reduction gearbox with liquid cooling to deliver instant torque and efficient energy conversion. Designed for zero tailpipe emissions, it balances urban agility with practical range for daily commuting.
| Parameter | Value | Source |
|---|---|---|
| Displacement | N/A (Electric Motor) | |
| Fuel type | Electric | |
| Configuration | Permanent Magnet Synchronous Motor | |
| Aspiration | N/A | |
| Bore × stroke | N/A | |
| Power output | 110 kW (148 PS) | |
| Torque | 250 Nm (Instantaneous) | |
| Fuel system | N/A | |
| Emissions standard | Zero Tailpipe Emissions | |
| Compression ratio | N/A | |
| Cooling system | Liquid-cooled | |
| Turbocharger | N/A | |
| Timing system | N/A | |
| Oil type | Gear oil for reduction gearbox (SAE 75W-90) | |
| Dry weight | Not Published |
The electric motor provides instant torque for brisk urban acceleration but requires adherence to 20,000 km or annual service intervals to inspect the cooling system and gearbox oil. Battery health is paramount; using DC fast charging exclusively can accelerate degradation, so a mix of AC and DC charging is recommended. The single-speed gearbox is maintenance-free but relies on correct gear oil specification for longevity. Software updates via the dealership are critical for optimal BMS and motor control unit (MCU) performance.
Oil Specs: Requires SAE 75W-90 GL-4 gear oil for the reduction gearbox (SAIC Motor Owner's Manual). Critical for gearbox longevity.
Emissions: Zero tailpipe emissions certification applies to all models from 2020 onwards (VCA Type Approval #VCA/EV/MGZS).
Power Ratings: Measured under ISO 8854 standards. Output is consistent across all ZS EV applications (SAIC Motor PT-2022).
SAIC Motor Technical Information System (TIS): Docs EV-150-01, BMS-2022
VCA Type Approval Database (VCA/EV/MGZS)
ISO 8854: Road vehicles — Alternators — Performance requirements
The MG eMG 150 – Electric was used across MG's compact electric SUV platform with transverse mounting. This motor received no platform-specific adaptations, as it is exclusive to the ZS EV. All software calibrations are managed through over-the-air (OTA) or dealership updates. All adaptations are documented in OEM technical bulletins.
Locate the motor identification plate, typically affixed to the motor housing near the high-voltage cable entry point. The VIN's 8th digit often specifies the powertrain type ('E' for electric). Visually, the motor is identifiable by its compact, cylindrical housing and the prominent orange high-voltage cables. Critical differentiation: Ensure parts are specific to the eMG 150 motor and not the higher-output eMG 160 variant used in later models. Motor control unit (MCU) software is vehicle-specific and requires dealer-level tools for flashing.
The eMG 150's primary long-term consideration is high-voltage battery degradation, which can reduce range and available power. SAIC service data indicates that maintaining state-of-charge between 20% and 80% significantly slows degradation, while UK DVSA data shows no systemic motor failures reported. Adherence to scheduled software updates and cooling system checks is critical for sustained performance.
Analysis derived from SAIC Motor technical bulletins (2020-2024) and UK DVSA failure statistics (2021-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MG EMG-150.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Vehicle Certification Agency (VCA)
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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
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VCA Certification Portal
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