Core Insights - The overall complaint index for car manufacturers increased by 39% year-on-year, reaching 163,069.85 for the first three quarters of 2025, with all but one manufacturer showing an upward trend in complaints [2] Group 1: Complaint Index by Manufacturer - BYD leads with a complaint index of 71,529.2, up 115.01% year-on-year, primarily due to issues related to new car price reductions and upgrades, with 74% of complaints stemming from this issue [4][5] - Changan Automobile ranks second with a complaint index of 9,977.1, a 34.27% increase, with major complaints about system upgrades and transmission stuttering [5] - Chery Automobile holds the third position with a complaint index of 5,118.05, up 12.73%, with complaints focused on system upgrades and engine performance [5] Group 2: Notable Increases in Complaints - Li Auto's complaint index surged by 575% to 4,160.35, mainly due to issues with lower arm noise in the L series [6] - FAW Hongqi's complaint index rose by 543.82% to 2,981.55, with complaints centered on system lag and upgrade issues [6] - The overall complaint issues are concentrated in areas such as new car pricing strategies, system upgrades, transmission problems, and engine performance [6]