Auto Headlight Lamp Control Switch — Light Sensor Module (Fit for MK4) a failing headlight switch or add automatic control to your MK4 vehicle with this auto headlight lamp control switch and light sensor module. The unit senses ambient light and controls headlight operation to improve visibility, convenience, and safety without driver intervention. Key benefits Automatic headlight activation and deactivation based on ambient light levels — enhances safety and eliminates forgotten lights. Reduces driver distraction by handling headlight function automatically in lowlight conditions, tunnels, and at dusk/dawn. Restores reliable control when an existing MK4 headlight switch or sensor is worn or malfunctioning. Key attributes Functionality: Integrated light sensor with headlight control switch to manage automatic on/off lamp operation. Compatibility: Specifically designed to fit MK4 vehicle headlight systems. Design: Compact module format intended for invehicle installation where the factory headlight switch is located. Performance: Responsive light sensing for consistent automatic control of exterior lamps under changing lighting conditions. Durability: Engineered to meet automotive electrical component demands for regular on/off cycling and incar environmental conditions. Typical use cases Night and lowlight driving: Automatically turns headlights on when ambient light drops to ensure visibility without manual switching. Transitional lighting conditions: Smoothly handles changes entering tunnels, parking structures, or shaded roadways so lights engage and disengage appropriately. Replacement or upgrade: Swap in this module to a failing MK4 headlight switch or light sensor to restore automatic lamp control functionality. Installation and notes Designed to integrate with MK4 headlight systems. Compatibility should be confirmed with the vehicle's existing switch/harness before . Professional installation or installation by a qualified technician is recommended if you are unfamiliar with automotive electrical systems. Intended for use as described; confirm fit for your specific MK4 model variant prior to installation. This auto headlight lamp control switch with light sensor module provides a practical, safetyfocused upgrade or replacement for MK4 vehicles needing reliable automatic headlight operation.