This vehicle serves as yet another example of why some hybrid systems struggle to offer a sustainable long-term solution. After monitoring internal reports and Nissan owner groups, we have observed that the so-called “self-charging hybrid” frequently experiences failures.
One particular case involved an electric generator motor failure at just 10,000 km—and this is not an isolated incident. While conceptually, this system is close to what could be an ideal hybrid design—where the internal combustion engine (ICE) acts solely as a generator to charge the battery and power the drive motor—the real-world execution does not align with expectations.
Technical Concerns & Failure Reports
This system utilizes:
- A three-liter turbocharged ICE that runs a Denso PMSM electric generator.
- A third electric motor for propulsion.
- A 2.2 kWh air-cooled battery, which is relatively small for an electrified system and lacks home-charging capability.
Key Issues Identified:
- A new generator electric motor costs €11,000 (excluding installation).
- A second drive motor also reportedly fails within the same 15,000-30,000 km range.
- Replacement cost of the drive motor is €17,000, excluding labor.
This presents a significant cost burden for owners, as in addition to these potential electric motor replacements, the vehicle still requires regular ICE maintenance, including:
- Oil changes
- Turbo maintenance
- Belt replacements
- Filter replacements
Failure Diagnosis & Potential Causes
From reports of failed generator motors, the primary fault appears to be insulation breakdown, which can lead to internal short circuits or stator overheating. The suspected cause is vibrations and thermal expansion from the ICE, which may contribute to cracking of the stator insulation.
Notably:
- Bearings are in good condition.
- There is no evidence of coolant or moisture penetration.
- Hairpin stator design appears vulnerable to mechanical stress over time.
This raises the question: Can these stators be repaired using traditional round-wire winding technology, or is full replacement the only option?
Cost vs. Functionality—Is This System Sustainable?
Given the high failure rates and replacement costs, this system appears to place a significant financial burden on owners. With an ICE engine, two electric motors, and a hybrid battery all requiring maintenance and potential replacement, the overall cost structure is considerably high.
While the battery price is unclear, Nissan battery replacements have historically started at €10,000 or more. If that remains the case, the total cost of maintaining this system far exceeds its expected savings.
Final Thoughts
For service centers and repair specialists, this hybrid system may present interesting engineering challenges, but for owners, the financial implications are considerable. The long-term cost-effectiveness and sustainability of this system should be carefully evaluated before purchase.
Let me know if you need further refinements! 🚀
OEM Generator: €11,000+ labor
EVC: not possible
Part number: 212000-1080
Supplier: Denso
OEM Drive unit: 17000€+Labor
OEM Battery: 10000€+Labor (2 kWh battery)
