CARFACTBOOK / DIAGNOSTIC REFERENCE

Start with the symptom. Follow the evidence.

Choose a symptom and your exact chassis when possible. Each next check follows the result you record—not a guessed failed part. CarFactBook keeps a traceable path and prepares a practical mechanic handoff.

Symptom first

What are you seeing?

Electrical

Won't start / hard starting

Check reviewed reports for Nissan Note e-POWER HE12.

Electrical

Warning light or message

Check reviewed reports for Nissan Note e-POWER HE12.

Cooling

Overheating / running hot

Check reviewed reports for Nissan Note e-POWER HE12.

A/C / climate

A/C not cold

Check reviewed reports for Nissan Note e-POWER HE12.

Suspension / steering

Vibration / shaking

Check reviewed reports for Nissan Note e-POWER HE12.

Brakes

Brake problem

Check reviewed reports for Nissan Note e-POWER HE12.

Hybrid / EV system

Hybrid-system problem

Check reviewed reports for Nissan Note e-POWER HE12.

Fuel / emissions

Poor fuel economy

Check reviewed reports for Nissan Note e-POWER HE12.

Choose an exact vehicle

Selected: Nissan Note e-POWER HE12 · 2016–2020

Diagnostics v3 · Structured symptom flow

Hybrid-system problem — structured test-result path

0 results recorded
Safety boundary. High-voltage hybrid/EV systems can be hazardous. Do not open or probe high-voltage components unless you are trained and equipped for the vehicle.
Next reachable check

Is there an exact hybrid-system warning or diagnostic code?

The exact message/code is stronger evidence than guessing which hybrid component failed.

Mechanic handoff summary

Further evidence required. 0 reachable results recorded.

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Preparing Diagnostics v3 handoff…

After a mechanic checks or repairs the car

Close the loop with the actual diagnosis, repair, part, cost and follow-up. The exact vehicle, symptom area and the test-result path above are prefilled, but you can edit them before submitting.

Choose an exact vehicle above to prepare a repair-outcome report.Reports remain pending until CarFactBook reviews them. A diagnostic path or external test result never becomes a confirmed diagnosis automatically.
Nissan Note e-POWER HE12

Useful references for your exact car

These references relate to the selected symptom. They do not identify a faulty component or recommend replacing it. Confirm equipment, production period and source caveats for your individual car.

Verified facts

12V battery →

LN2 60Ah on most HE12 e-POWER grades; LN1 50Ah on e-POWER S

Battery fitment varies by grade and equipment. Match the grade and production date before purchasing a replacement.

Nissan Motor Co. · Verified 2026-09-27

Engine coolant capacity →

Approx. 6.96 L on 2016–mid-2018 HE12; 6.78 L from Jul 2018 change (including reservoir)

Production period matters; verify the vehicle date before servicing.

Nissan Motor Co., Ltd. · Verified 2026-10-02

Front traction motor →

EM57 AC synchronous motor · 80 kW (109 PS) max · 254 N·m max

The specification also lists 70 kW rated output; this record highlights maximum figures.

Nissan Motor Co., Ltd. · Verified 2026-10-02

Inverter coolant capacity →

Approx. 4.24 L on 2016–mid-2018 HE12; 4.16 L from Jul 2018 change (including reservoir)

Production period matters; verify the vehicle date before servicing.

Nissan Motor Co., Ltd. · Verified 2026-10-02

Traction battery type →

Lithium-ion battery

This high-voltage traction battery is separate from the 12V auxiliary battery.

Nissan Motor Co., Ltd. · Verified 2026-10-02

Step-by-step guides

Nissan Note e-POWER HE12 Key-Fob Battery Replacement →

Manufacturer-referenced Nissan Note e-POWER HE12 intelligent-key CR2025 replacement procedure. Confirm intelligent-key type before opening.

Easy · 5–10 minutes

Intelligent key CR2025 is different from the remote-entry key CR1620. Nissan specifies the CR2025 positive (+) side DOWN. Wrap the opening screwdriver in a cloth and do not insert it deeply; internal circuits may be damaged. Do not force the cover. Keep button cells and loose parts away from children.

Nissan Note e-POWER HE12: Choose LN1 or LN2 12V Battery →

Nissan's official HE12 12V battery chart distinguishes LN1 50Ah for e-POWER S equipment from LN2 60Ah for most other e-POWER grades. Identify the exact model year and equipment before buying.

Easy · 5–10 minutes to check equipment

Battery-selection reference only—not instructions for disconnecting or replacing a vehicle battery. Confirm grade, production date, equipment, case dimensions and fitting against Nissan's current parts data and the existing battery. Hybrid high-voltage components require special precautions.

Maintenance

Documented service references; your service history determines what is due.

Inverter coolant service reference

Condition based

Service the e-POWER inverter cooling circuit using the production-period-specific quantity and approved coolant/procedure.

Nissan states replacement timing should be checked in the maintenance note; no interval is inferred here.

Nissan Japan Note E12/HE12 fluid and coolant FAQ ↗ · Verified 2026-10-02

Key fob battery replacement

Condition based

Use a CR2025 battery for the documented Nissan Intelligent Key / key-fob reference.

Confirm key type before replacement.

Nissan Japan FAQ ↗ · Verified 2026-10-02

Engine coolant service reference

Condition based

Use the HE12 production-period-specific engine coolant quantity and manufacturer-specified coolant/service procedure.

Nissan states replacement timing should be checked in the maintenance note; no interval is inferred here.

Nissan Japan Note E12/HE12 fluid and coolant FAQ ↗ · Verified 2026-10-02

Full exact-car maintenance schedule →

Parts / fitment

Reference specifications, not a shopping list or proof that these parts need replacement. Fitment conditions still apply.

12V battery

LN2 60Ah on most HE12 e-POWER grades; LN1 50Ah on e-POWER S

Battery fitment varies by grade and equipment. Match the grade and production date before purchasing a replacement.

Nissan Motor Co. source ↗ · Verified 2026-09-27

Key fob battery

CR2025

Applicability follows the exact model/chassis code and configuration stated by the manufacturer source.

Nissan Motor Co. source ↗ · Verified 2026-09-27

Front traction motor

EM57 AC synchronous motor · 70 kW rated · 80 kW max · 254 N·m max

HE12 e-POWER front traction-motor reference from Nissan.

Nissan Motor Co., Ltd. source ↗ · Verified 2026-10-02

Traction battery architecture

Lithium-ion traction battery

High-voltage traction-battery architecture; separate from the 12V auxiliary battery.

Nissan Motor Co., Ltd. source ↗ · Verified 2026-10-02

Engine coolant

Approx. 6.96 L pre-Jul-2018 / 6.78 L from Jul 2018, including reservoir

HE12 production period changes the reference quantity; verify build period.

Nissan Motor Co., Ltd. source ↗ · Verified 2026-10-02

Inverter coolant

Approx. 4.24 L pre-Jul-2018 / 4.16 L from Jul 2018, including reservoir

This is the e-POWER inverter cooling circuit; verify build period and service procedure.

Nissan Motor Co., Ltd. source ↗ · Verified 2026-10-02

Full exact-car parts references →

Reviewed repair evidence

Hybrid-system problem

0 related reports

Reports are matched by related system category for Nissan Note e-POWER HE12. Compare the recorded symptom and outcome; a repair on another car does not diagnose yours.

No reviewed match yet. CarFactBook will not manufacture a likely cause just to fill this screen. Check the exact vehicle facts or contribute a real repair outcome through Problems.

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