[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 will cause your bulb to burn. Every ballast is designed to connect directly to your vehicle and requires NO programming or coding. [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 and durability [Fast startup & safe stability]built-in high pressure bag can current conduction speed & save power consumption for fast startup,also can protect high pressure bag from any dust & rain in the engine environment to enhance security One new xenon headlight low beam bulb ballast. Please comfirm the parts number before purchase . Suitable for D1S D1R,Direct replacement Product Description: Condition:New,100% factory tested Positions:Left or Right Side Voltage:12V Power:35W Replaceable part number: 92190-3Z200 921903Z200 3Z921-01700 3Z92101700 A2921-08100 A292108100 Fits xenon headlights of: For Coupe 2012-2016 For i30 2011-2015 For i40 2011-2015 For 'D 2012 Colour:Silver Material:metal Package Contents: 1 x Headlight Ballast Only the above package content, other products are not included. Note: Light 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.