VW Control Unit - Magneti Marelli 1T0907391

Product Information

A headlight control module (sometimes called a headlamp control unit or lighting control module) is an electronic unit that manages and regulates a vehicle’s headlight functions. It communicates with onboard sensors, switches, and the vehicle’s ECU to control operations such as:

• Turning headlights on/off automatically based on ambient light conditions.
• Operating daytime running lights (DRLs).
• Adjusting beam levels (auto-leveling systems).
• Managing adaptive or dynamic headlight systems (e.g., cornering lights, matrix LEDs).

It ensures proper illumination for safety while optimizing power consumption and compliance with regulations.

• Headlights Not Functioning Properly – One or both headlights may fail to turn on, flicker, or remain stuck in high/low beam.
• Warning Lights or Error Messages – Dashboard warnings (e.g., “headlamp malfunction”) appear due to faulty communication with the ECU.
• Loss of Advanced Functions – Automatic headlights, adaptive beam control, or daytime running lights stop working as intended.

About Magneti Marelli

For over 100 years Magneti Marelli has excelled at the design and manufacture of hi-tech automotive systems including acting as an OEM (original equipment manufacturer) of lighting systems for all major car manufacturers worldwide including Audi, BMW, Honda, Land Rover, Mercedes, Toyota and Volvo. The lighting division of Magneti Marelli is located in Reutlingen, Germany where they design the lighting as well as the manufacturing process. Then there are 16 manufacturing factories globally where they manufacture headlights, turn signals, light bulb signals, and tail lights. Magneti Marelli brand OE lighting equipment may be packaged underneath Marelli's brand Automotive Lighting after to recent merger with Calsonic Kansei in 2019, and restructuring of the branding to suit new OE technological progress.