The Mitsubishi i — MiEV Motor is a permanent magnet synchronous electric traction motor with a peak output of 47 kW (64 PS) and continuous rating of 30 kW. It delivers 180 Nm of torque instantly from 0 rpm and is integrated with a single — speed reduction gear and inverter in a compact transaxle unit. The motor weighs 64 kg and operates at up to 12,000 rpm, enabling a top speed of 130 km/h and 0–100 km/h in approximately 15.9 seconds.
Fitted exclusively to the i — MiEV hatchback (ZAA‑M…
Production years 2009–2021 meet EU Directive 2007/46/EC and Japanese MLIT EV certification standards (JAMA Type Approval #JAMA/EV/0891).
The Mitsubishi i-MiEV Motor is a 47 kW permanent magnet synchronous electric traction motor engineered for urban EVs (2009–2021). It combines high-torque density with a single-speed reduction gear and integrated inverter to deliver instant acceleration and efficient regenerative braking. Designed to meet EU and Japanese EV certification standards, it prioritizes compactness and thermal resilience.
| Parameter | Value | Source |
|---|---|---|
Motor type | Permanent magnet synchronous motor (PMSM) | |
Peak power | 47 kW (64 PS) | |
Continuous power | 30 kW | |
Peak torque | 180 Nm @ 0–2,000 rpm | |
Maximum speed | 12,000 rpm | |
Cooling system | Air‑cooled (passive convection) | |
Gear reduction ratio | 6.033:1 | |
Inverter type | IGBT-based, integrated with motor housing | |
Operating voltage | 330 V DC (nominal) | |
Weight | 64 kg (motor + reduction gear) | |
Regenerative braking | Up to 0.2g deceleration; 3 levels via paddle | |
Emissions | Zero tailpipe emissions |
The Mitsubishi i-MiEV Motor was used across Mitsubishi's ZAA‑M05A platform with transverse mounting and licensed to PSA Group for the Peugeot iOn and Citroën C‑Zero. This motor received platform-specific adaptations—revised inverter firmware in the Citroën C‑Zero and updated thermal shielding in the i-MiEV facelift—and from 2015 the revised inverter modules adopted polymer capacitors, creating minor ECU and inverter interchange limits. All adaptations are documented in OEM technical bulletins.
The i-MiEV Motor's primary reliability risk is inverter capacitor degradation in high-ambient-temperature environments, with elevated incidence in Mediterranean or Southeast Asian use. Mitsubishi internal quality reports from 2014 indicated that pre-2015 builds showed reduced regenerative braking efficiency after 80,000 km in hot climates, while EU service records show minor 12V auxiliary battery faults as a secondary concern due to inverter logic sensitivity. Extended exposure to underhood heat and infrequent use accelerate capacitor aging, making thermal management critical.
Analysis derived from Mitsubishi technical bulletins (2013–2018) and EU national EV inspection data (2015–2022). Repair procedures should follow manufacturer guidelines.
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The i-MiEV motor itself is highly reliable with no moving parts beyond the rotor and gears. The main concern is inverter capacitor aging in hot climates—pre-2015 units are more susceptible. With proper 12V battery maintenance and inverter inspections every 60,000 km, the system can exceed 150,000 km without major issues.
Top issues include inverter capacitor degradation (pre-2015), 12V auxiliary battery failure, reduction gear whine (NVH, not failure), and cooling fin obstruction. All are documented in Mitsubishi service bulletins. The motor itself rarely fails—issues are typically electronic or thermal.
The motor powers the Mitsubishi i-MiEV (2009–2021), Peugeot iOn (2010–2019), and Citroën C‑Zero (2010–2019). These are badge-engineered variants sharing the same ZAA‑M05A platform and powertrain. No other manufacturers used this specific motor design.
Limited tuning is possible. Inverter firmware remaps can increase torque output by ~10%, but thermal limits and battery C-rate constrain gains. Most owners focus on battery refurbishment rather than motor tuning. Significant power increases require a full drivetrain swap.
With the original 16 kWh battery, expect 100–130 km (62–81 miles) in mixed driving. Range drops to 70–90 km in winter or highway use. Battery degradation is common after 8–10 years—many owners upgrade to 20–24 kWh refurbished packs for 150+ km range.
No. The motor and reduction gear are sealed for life and require no fluid changes. The reduction gear uses a special synthetic oil filled at the factory—no service interval is specified. Only the 12V system and inverter cooling need periodic checks.
Minimal mechanical maintenance. Inspect inverter cooling fins annually, replace the 12V AGM battery every 4–5 years, and check for inverter capacitor health every 60,000 km in hot climates per TSB EV‑13‑002. No timing belts, oil, or exhaust systems to maintain.
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