Chinese EV Makers Face Regulatory Crackdown Over OTA Locking

Is the practice of OTA (Over-The-Air) battery locking in Chinese electric vehicles a hidden risk for global investors?

In recent months, a significant surge in consumer complaints has prompted the Chinese Ministry of Industry and Information Technology (MIIT) to take action against several leading EV manufacturers. According to data from the national 12315 platform, complaints related to OTA battery locking in March 2026 exceeded 12,000, a staggering 273% increase year-over-year. This dramatic rise in complaints has led the MIIT to issue warnings and launch investigations into eight major EV companies.

What is OTA Battery Locking?

OTA battery locking refers to the practice where automakers, without explicit consent from vehicle owners, remotely adjust the battery management system (BMS) parameters through software updates. These adjustments can limit the battery’s charging capacity, discharge depth, and power output, effectively reducing the vehicle’s range, charging speed, and performance. The primary justification given by manufacturers is to enhance battery safety and reduce the risk of thermal runaway, but the underlying motive often involves cost-cutting measures, such as reducing warranty claims and extending battery life.

Regulatory Response and Consumer Impact

The MIIT’s intervention is a clear signal that the government is taking a firm stance on protecting consumer rights and ensuring the integrity of the EV market. Three companies have been formally investigated for unauthorized OTA battery locking, while two others have voluntarily removed the contentious software updates and promised to restore the original performance of their vehicles. This regulatory crackdown underscores the importance of transparency and compliance in the rapidly evolving EV industry.

• Complaints surged 273% in March 2026, highlighting a growing consumer backlash.
• Eight major EV companies were warned, with three under formal investigation.
• Two companies have taken proactive steps to address the issue, removing the problematic updates and restoring vehicle performance.

Global Implications for Investors and Manufacturers

The regulatory actions in China are not isolated incidents. Similar concerns over OTA updates and consumer rights have been raised in other markets, including the United States and Europe. For Western investors and manufacturers, this situation serves as a cautionary tale about the potential risks associated with the misuse of OTA technology. As the global EV market continues to grow, it is crucial for companies to prioritize transparency, consumer trust, and regulatory compliance.

For a deeper dive into the technical and strategic implications of OTA updates in the EV sector, see our analysis on OTA Updates in the EV Market.

Conclusion

The recent regulatory crackdown on OTA battery locking in China highlights the critical need for transparency and consumer protection in the EV industry. As the market continues to evolve, it is essential for both manufacturers and investors to stay informed and vigilant about the potential risks and opportunities presented by emerging technologies.