The promotion of new energy vehicles (NEVs) in China not only provides a pathway for the country to achieve its “dual carbon” strategic goals but also facilitates the transformation and upgrading of the automotive industry, contributing to social development and economic growth. This study examines the influence mechanism of brand crises on consumer purchase intentions within the NEV sector, an area critical to sustainable infrastructure and green development. Using a framework of “brand crisis—consumer negative emotions/perceived risk—consumer purchase intention,” and data from consumer surveys conducted in Beijing, Shanghai, Zhengzhou, and two other locations, the study employs regression models to analyze the relationship between brand crises and purchase intentions. Mediation effect models are used to explore how brand crises impact consumer purchase intentions through negative emotions and perceived risks. The results indicate that brand crises significantly reduce consumers’ willingness to purchase products from affected brands, posing a threat to the market stability and growth of the NEV sector. Moreover, negative emotions and perceived risks mediate the relationship between brand crises and purchase intentions, highlighting the importance of addressing both emotional and cognitive responses in crisis management strategies. To mitigate the adverse effects of brand crises, companies should adopt measures to improve consumer sentiment and reduce perceived risks, such as proactive communication, transparency, and effective recall procedures. Additionally, factors such as NEV performance, price, and charging infrastructure coverage also play a crucial role in consumer purchase decisions. Therefore, companies must consider these factors when formulating crisis response strategies to swiftly regain consumer trust and promote sustainable market and green development. This study contributes to the broader discourse on infrastructure development and public policy by providing insights into how brand crises in the NEV industry can be managed to support sustainable economic growth and development. By understanding the mechanisms through which brand crises affect consumer behavior, this research offers valuable recommendations for policymakers, industry professionals, and academic researchers focused on the interplay between infrastructure, development, and policy.