Recently, Chezhilian and Kairuisi Consulting jointly released the report titled “2025 Quality Performance Research on the Three Electric Systems of New Energy Vehicles in China”. The report indicates that the overall quality performance of the three electric systems (battery, motor, and electronic control) in new energy vehicles has shown a positive trend this year, with a significant reduction in the number of reported issues. However, user complaints have increased.
According to the study, domestic brands outperform foreign brands in terms of overall quality performance, with extended-range models demonstrating the best performance among all power types. Furthermore, the report highlights that users of pure electric vehicles show a positive correlation between their focus on range and the vehicle’s size. Economic performance emerges as a critical indicator affecting users’ willingness to recommend brands.
Since 2019, Kairuisi Consulting has published the annual “China Automotive Product Quality Performance Research Report (AQR)”. In 2021, new energy vehicles were designated as an independent research category, and from 2023 onwards, the focus shifted to the quality performance of the three electric systems. This study is based on extensive user complaint data and a multi-dimensional quality performance research model, providing an in-depth analysis of users’ perceptions and attitudes toward the quality of the three electric systems from the user experience perspective.
The current survey covers 62 models, including pure electric, plug-in hybrid, and extended-range vehicles, from 32 brands, involving 23 powertrain suppliers and 14 battery system suppliers. The findings reveal that while the quality performance of the three electric systems continues to improve and the number of issues has noticeably decreased, user complaints have risen.
Among the secondary dimensions (range, charging, motor, and energy recovery), the quality performance related to range remains the weakest, although it has improved compared to last year. The most significant issue reported is related to “vehicle battery decay,” while the highest user complaint rate pertains to “sudden drops in remaining range display.”
Technological breakthroughs by leading domestic suppliers such as Huawei Smart Electric and Grebo have provided domestic brands with strong collaborative advantages in the industry chain, resulting in the overall quality performance of their three electric systems being superior to that of foreign brands across all four secondary dimensions.
Specifically, foreign brands have shown poorer performance in issues concerning battery decay and inaccuracies in displaying remaining power/range. Extended-range models exhibit the best overall quality performance, while pure electric vehicles, despite improvements, still face significant issues, especially regarding “inaccurate remaining power/range display” and “battery decay.” Plug-in hybrid models tend to encounter issues earlier, particularly concerning long charging times and inaccurate remaining time predictions.
The study conducts an in-depth analysis of three major issues: battery decay, inability to fully charge, and motor noise. Battery decay issues begin to appear in bulk after three months of ownership, typically occurring within the 20,000-50,000 kilometer range, with the majority experiencing a decay rate of 0%-20%. Problems with charging to full capacity mainly arise 3-6 months post-purchase, with higher failure rates observed in fast charging scenarios. Motor noise can occur within the first year of purchase, affecting both new and high-mileage vehicles, with the highest frequency observed during deceleration scenarios, accounting for 70% of complaints.
Regarding range satisfaction, users rated their overall satisfaction with the range of pure electric vehicles at 6.50 out of 10. The average completion rate for range in summer is 77.21%, while in winter, it is 64.47%. Both summer and winter completion rates have shown improvement compared to last year, with leading domestic brands performing particularly well.
The research also found that users’ focus on range and their expectations are positively correlated with vehicle size. Compared to 2024, expectations for range have increased across all vehicle sizes in 2025, with varying trends in range focus. Additionally, a study on the impact of performance satisfaction on brand recommendation suggests that users are more likely to recommend a brand due to strong performance in specific areas, with economic efficiency being a key indicator influencing users’ willingness to recommend brands.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/quality-performance-analysis-of-the-electric-drive-system-in-chinas-new-energy-vehicles-for-2025/
