Material: The headlight control module is made of metal + ABS, which has good flame retardancy, heat dissipation and shock resistance. Helps the headlights work more stably and ensures that both low and high voltages can start normally. Compatible with Passat 2006 2007 2008 2009 2010 Function: This ballast is waterproof, shockproof, and has high and low voltage protection functions. After installation, it can greatly extend the service time of the bulb. Installation: This H-ID headlight ballast is made of special materials and through-hole components, meeting or exceeding OEM specifications. Plug and play, no programming or coding of the car is required. Suitable for left or right headlights. Quality: Made of materials that meet strict OEM requirements, this product offers stable performance and is an ideal replacement option. Note: To ensure you receive the correct item, please confirm that your OEM number matches the one in the description.