This product is specifically designed for the BYD Qin PLUS DM-i (including Champion Edition and Glory Edition). It is a core control module installed behind the steering column—the combination switch assembly. This switch assembly integrates lighting control (high/low beam, turn signals, front/rear fog lights), wiper adjustment (intermittent mode, speed settings, front/rear washer), automatic lighting (AUTO mode), and signal transmission functions. Through mechanical linkage and electronic signal transmission, it converts the driver's commands into vehicle execution actions, serving as the "command center" between the driver and the vehicle's electrical systems.

The Qin PLUS DM-i comes standard with automatic headlights. When the knob at the end of the light switch is turned to AUTO mode, the combination switch, via the BCM, reads the brightness value from the ambient light sensor and automatically controls the activation or deactivation of the position lights and low beam headlights.This product is developed and manufactured strictly according to BYD OEM technical standards, using high-strength engineering plastic and precision micro-switches in a composite structure, with a stable internal circuit board and conductive copper contacts. It passes rigorous durability and salt spray tests, with OE numbers precisely matching the original vehicle for direct replacement of faulty or worn original combination switch assemblies.