The Smart eDC 82 kW is a permanent-magnet synchronous electric motor co-developed with Renault for the Smart EQ Fortwo and Forfour (453 platform) from 2018 to 2024. It delivers 82 kW (111 PS) and 160 Nm of torque through a single-speed reduction gearbox, enabling 0–100 km/h in approximately 11.4 seconds. Liquid-cooled power electronics and a high-voltage traction battery (17.6 kWh usable) support consistent urban performance and thermal stability.
Fitted exclusively to the Smart EQ Fortwo and Forfour hatchbacks, the eDC 82 kW motor was engineered for agile city driving, silent operation, and low lifecycle emissions. Regenerative braking with selectable modes enhances efficiency in stop-start traffic. The powertrain complies with Euro 6d emissions-equivalent standards for zero-tailpipe vehicles under EU Regulation (EC) No 715/2007 and VCA Type Approval protocols.
One documented concern is intermittent loss of drive reported in early 2018–2019 builds, linked to software-induced inverter shutdowns under rapid thermal cycling. This issue was addressed in Renault–Smart Service Bulletin SIB-EM-04-2019, which mandated an update to the motor control unit (MCU) firmware to improve thermal hysteresis logic and prevent false fault triggers.
Smart
All production years (2018–2024) meet zero tailpipe emission requirements under Euro 6d-equivalent standards for BEVs (VCA UK Type Approval #VCA/BEV/8872).
The Smart eDC 82 kW is a 82 kW permanent-magnet synchronous motor engineered for compact urban EVs (2018–2024). It combines liquid-cooled power electronics with regenerative braking to deliver responsive low-speed torque and efficient city driving. Designed to meet zero-emission vehicle (ZEV) requirements under Euro 6d-equivalent standards, it balances drivability with minimal maintenance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | N/A (electric motor) | |
| Fuel type | Electric (BEV) | |
| Configuration | Permanent-magnet synchronous motor (PMSM) | |
| Aspiration | N/A | |
| Bore × stroke | N/A | |
| Power output | 82 kW (111 PS) | |
| Torque | 160 Nm (constant from 0 rpm) | |
| Fuel system | N/A | |
| Emissions standard | Zero tailpipe emissions (Euro 6d-equivalent BEV) | |
| Compression ratio | N/A | |
| Cooling system | Liquid-cooled inverter and motor housing | |
| Turbocharger | N/A | |
| Timing system | N/A (electric) | |
| Oil type | N/A (no engine oil); gearbox uses synthetic gear oil (Renault MTF 75W-80) | |
| Dry weight | 72 kg (motor + inverter assembly) |
The eDC 82 kW motor provides instant torque ideal for urban environments but relies on stable thermal management of the inverter and battery. Early models (2018–2019) require firmware update per SIB-EM-04-2019 to prevent unexpected drive loss during rapid temperature shifts. The single-speed gearbox uses Renault-specified MTF 75W-80 gear oil, which should be inspected every 60,000 km. No oil changes or exhaust maintenance are needed, but 12V auxiliary battery health is critical—failure can disable the high-voltage contactor. Regenerative braking reduces pad wear but requires periodic calibration via dealer diagnostics after brake service.
Oil Specs: Gearbox requires Renault MTF 75W-80 (Smart SIB-EM-04-2019). No engine oil used.
Emissions: Zero tailpipe certification applies to all model years (2018–2024) under VCA Type Approval #VCA/BEV/8872. Confirmed as BEV under EU Regulation (EC) No 715/2007.
Power Ratings: Measured under UN ECE R85 and SAE J1349 equivalent for electric motors. Peak output sustained for 30 seconds (Smart TIS EM-453-02).
Smart Technical Information System (TIS): Docs EM-453-01, EM-453-02, EM-453-03, SIB-EM-04-2019
VCA Type Approval Database (VCA/BEV/8872)
EU Regulation (EC) No 715/2007 and (EU) 2017/1151
The Smart eDC 82 kW was used across Smart's 453 platform with transverse mounting and co-developed with Renault under the Daimler–Renault–Nissan alliance. This motor was integrated into both two- and four-door variants with identical powertrain architecture—and from 2020 received updated MCU firmware to enhance thermal resilience, creating minor software-based interchange limits. The motor shares core inverter hardware with the Renault Zoe R110. All adaptations are documented in OEM technical bulletins.
Locate the motor identification plate on the left side of the motor housing near the high-voltage connector (Smart TIS EM-453-01). The 7th VIN digit is 'E' for all EQ electric models. Pre-2020 units use MCU part number 820084532R; post-2020 updated units use 820084532S with revised thermal logic. Critical differentiation from higher-output eDC 60 kW: 82 kW units have larger inverter heat sinks and 160 Nm torque rating. Software version must be verified via Smart STAR diagnostics—hardware swaps without firmware alignment may trigger inverter faults (Smart SIB-EM-04-2019).
The eDC 82 kW's primary reliability risk is inverter-induced drive loss in early builds, with elevated incidence during rapid ambient temperature swings. Smart internal field data from 2019 indicated a measurable rate of drive interruptions in pre-firmware-update vehicles, while UK DVSA records show minimal MOT failures (as BEVs are exempt from emissions testing). Thermal cycling and infrequent use increase inverter fault risk, making software currency critical.
Analysis derived from Smart technical bulletins (2018–2020) and UK DVSA failure statistics (2019–2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about SMART EDC-82KW.
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