What Causes the Headlights to Move Up and Down When Starting the Car?

[McVincent]

When the headlights move up and down during car startup, this is a normal phenomenon. This action occurs because the vehicle is equipped with an adaptive front lighting system. The adaptive front lighting system performs a self-check every time the car starts to ensure the system functions properly. The adaptive front lighting system is a dynamic lighting system that adjusts the low-beam axis horizontally in coordination with the steering wheel's turning angle and vertically in response to the vehicle's height. In other words, the height of the vehicle's headlights can change according to the vehicle's body height. This prevents the risk of accidents in dark environments due to delayed lighting adjustments when the vehicle's height changes.