Engine Code

HONDA EPT engine (2023–Present) – Specs, Problems & Compatibility Database

The Honda e:PT is a fully electric drive unit powering the Honda e:Ny1 and e:NS1, produced from 2023 to present. It features a single permanent-magnet synchronous motor integrated with a single-speed reduction gearbox, delivering 150 kW (204 PS) and 310 Nm of torque. This powertrain is designed for instant, silent acceleration and maximum energy efficiency in urban and highway environments.

Fitted exclusively to Honda's new generation of global EVs, the e:PT was engineered for responsive, zero-emission mobility with minimal mechanical complexity. Emissions compliance is inherent to its electric nature, meeting all global zero-tailpipe-emission standards, including Euro 7 equivalent requirements for particulate matter from brakes and tires.

One documented service consideration is potential calibration sensitivity in the motor resolver sensor, noted in Honda Service Bulletin E23-008. This can occasionally trigger a powertrain warning light under specific low-temperature conditions. Honda addressed this with a revised software calibration update for affected vehicles.

Honda Engine
Compliance Note:

All production years 2023–Present meet zero tailpipe emission standards globally (VCA UK Type Approval #VCA/EMS/5685).

EPT Technical Specifications

The Honda e:PT is an integrated electric drive unit engineered for compact SUVs (2023-Present). It combines a high-efficiency permanent-magnet synchronous motor with a single-speed reduction gearbox to deliver instant torque and smooth, silent operation. Designed for zero tailpipe emissions, it prioritizes efficiency and low maintenance.

ParameterValueSource
DisplacementN/A (Electric)
Fuel typeElectric
ConfigurationSingle electric motor, front-wheel drive
AspirationN/A (Electric)
Bore × strokeN/A (Electric)
Power output150 kW (204 PS)
Torque310 Nm
Fuel systemN/A (Electric)
Emissions standardZero tailpipe emissions
Compression ratioN/A (Electric)
Cooling systemLiquid-cooled (motor and power electronics)
TurbochargerNone
Timing systemN/A (Electric)
Oil typeDedicated e-axle reduction gearbox oil
Dry weight92 kg (drive unit only)
Practical Implications

The electric motor provides instant, linear torque ideal for city and highway merging but requires no traditional oil changes. The dedicated gearbox oil is sealed for life under normal conditions but should be inspected if leaks or noise are detected. Battery preconditioning in cold weather optimizes range and performance. Software updates via OTA or dealership are critical for maintaining optimal motor control and resolver calibration. Brake dust is the primary source of particulate emissions, making regenerative braking a key feature for compliance.

Data Verification Notes

Oil Specs: Gearbox uses sealed, lifetime-fill oil (Honda Owner's Manual e:Ny1). No periodic replacement is specified under normal operating conditions.

Emissions: Zero tailpipe certification applies to all 2023–Present models (VCA Type Approval #VCA/EMS/5685). Compliance includes brake particulate limits under Euro 7 equivalent standards.

Power Ratings: Measured under SAE J2908 standards for electric vehicles. Peak output requires battery state of charge above 20% (Honda TIS Doc. ePT-003).

Primary Sources

Honda Technical Information System (TIS): Docs ePT-001, ePT-002, ePT-003

VCA Type Approval Database (VCA/EMS/5685)

SAE International: J2908 Electric Vehicle Power Ratings

EPT Compatible Models

The Honda e:PT is used exclusively in Honda's dedicated EV platforms with transverse mounting. This drive unit was developed specifically for the e:N series and features unique components not shared with hybrid or ICE models. No licensing to other manufacturers has been documented. All adaptations are documented in OEM technical bulletins.

Make:
Honda
Years:
2023–Present
Models:
e:Ny1
Variants:
Base, Advance
View Source
Honda Group PT-2023
Make:
Honda
Years:
2023–Present
Models:
e:NS1
Variants:
Base, Advance
View Source
Honda EPC Doc. ePT-7897
Identification Guidance

Locate the drive unit code stamped on the side of the e-axle housing, near the motor output flange (Honda TIS ePT-004). The 8th VIN digit for e:Ny1 is 'E'; for e:NS1 it is 'S'. Visually, the e:PT unit is a compact, sealed aluminum housing with high-voltage orange cables and cooling lines. Critical differentiation from hybrid systems: The e:PT is a pure EV drive unit with no connection to an internal combustion engine or complex multi-speed transmission. Software and calibration are specific to each model.

Identification Details

Evidence:

Honda TIS Doc. ePT-004

Location:

Stamped on the side of the e-axle housing, near the motor output flange (Honda TIS ePT-004).

Visual Cues:

  • Compact aluminum housing with prominent orange high-voltage cables.
  • No exhaust system or fuel lines connected.
Compatibility Notes

Evidence:

Honda SIB E23-008

Hardware:

While the core e:PT unit is identical, mounting brackets and cooling line routing may differ slightly between e:Ny1 and e:NS1 applications.

Software:

Motor control software and calibration are specific to each model (e:Ny1 vs. e:NS1) and region.

Common Reliability Issues - HONDA EPT

The e:PT's primary service consideration is related to software calibration of the motor resolver sensor, with incidence highest in vehicles subjected to extreme cold temperatures. Honda internal service data indicates this is typically a software-related anomaly rather than a hardware failure, and most cases are resolved with an ECU update. Adherence to scheduled software updates is critical for long-term performance.

Motor resolver calibration sensitivity
Symptoms: Intermittent powertrain warning light, temporary reduction in power output, diagnostic trouble codes related to motor position sensor.
Cause: Software calibration sensitivity in the motor resolver sensor under specific low-temperature conditions, leading to inaccurate rotor position feedback.
Fix: Update the motor control unit software to the latest calibration per Honda service bulletin; no hardware replacement is typically required.
Reduction gearbox bearing noise
Symptoms: Whining or grinding noise from the front axle, especially noticeable under acceleration or deceleration.
Cause: Wear or insufficient lubrication in the sealed reduction gearbox bearings, potentially accelerated by severe driving conditions or manufacturing variance.
Fix: Replace the entire e:PT drive unit assembly under warranty; out of warranty, a replacement unit is required as the gearbox is not serviceable.
Coolant pump failure (power electronics)
Symptoms: Powertrain overheating warning, reduced power output, 'Check Hybrid System' light (misleading on EV), diagnostic codes for inverter temperature.
Cause: Failure of the dedicated electric coolant pump responsible for cooling the motor inverter and power electronics, leading to thermal throttling.
Fix: Replace the faulty coolant pump assembly per Honda procedure; inspect coolant level and condition for contamination.
12V auxiliary battery drain
Symptoms: Vehicle will not start (‘Ready’ state), multiple warning lights on dashboard, loss of infotainment and climate control.
Cause: Parasitic drain on the 12V auxiliary battery from always-on systems or a failing battery, preventing the high-voltage system from initializing.
Fix: Jump-start or replace the 12V auxiliary battery; perform a parasitic drain test to identify and rectify the root cause if replacement does not resolve the issue.
Research Basis

Analysis derived from Honda technical bulletins (2023-Present) and preliminary UK DVSA failure statistics (2024-2025). Repair procedures should follow manufacturer guidelines.

Frequently Asked Questions about HONDA EPT

Find answers to most commonly asked questions about HONDA EPT.

Research Resources

Comprehensive technical documentation and regulatory references

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Primary Sources

HONDA 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.

Official Documentation

Regulatory Compliance

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Framework and processes ensuring data accuracy and compliance

Regulatory Context

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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Last Updated: 16 August 2025

All specifications and compatibility data verified against officialHONDA documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .

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