<p>Features:</p> <p>[HID headlight ballast replacement]Headlight Control Unit, a crucial part of HID lighting system, provides the voltage needed to start the lamp and regulates the electrical current of the light once it is lit. A failed ballast cause your bulb to burn. Every ballast is designed to connect directly to your vehicle and requires NO programming or coding.</p> <p>[Replace Part Number \u0026 Easy installation ]31427787 A2C7517490</p> <p>[Premium quality ]made of premium aluminum for better heat dissipation and vibration resistance,6 protections against overpressure,low pressure,overheating,no-load,short circuit,reverse connection for more safety and durability</p> <p>[Fast startup \u0026 safe stability]built-in high pressure bag can current conduction speed \u0026 save power consumption for fast startup,also can protect high pressure bag from any dust \u0026 rain in the engine environment to enhance security</p> <p>Name:LED Headlight Control Module Ballast</p> <p>Model Name:31427787 A2-C751-7490</p> <p>Item Type:Ballast</p> <p>For Vehicle \/Model: for </p> <p>Part Number: 31427787 A2C7517490</p> <p>Fit:For S60 V90 XC40 XC60</p> <p>Color: As shown</p> <p>Material: plastic+metal</p> <p>Package Contents:</p> <p>1 x LED Headlight Control Module Ballast</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>