The headlight control unit is a key part of the HID lighting system, which can provide the voltage required to start the lamp and adjust its current after the lamp is lit. Failure of the ballast can cause the bulb to burn out. Each ballast is designed to be directly connected to your vehicle and requires no programming or coding.Made of high-quality metal, with better heat dissipation and vibration resistance, 6 kinds of overpressure, low pressure, overheating, no-load, short circuit, reverse connection protection to improve safety and durabilityQuick start, safe and stable: built-in high-pressure bag can the current conduction speed, save power consumption, can start quickly, and also protect the high-pressure bag from dust and rain in the engine environment, improve safetyInterchangeable part number 13073293180063127255724 (63 12 7 255 724),63117356250 (63 11 7356250)63127296090 (63 12 7 296 090)130732931613073292721307329316001307329272001307329272130732931663117317408 D1SFITMENT forfor 2015-2016 X6,for 2012-2016 X5,for 2015-2016 X4,for 2011-2016 X3,for 2014-2016 Z4,for 2010-2016 3 Series sedan,for 2010-2012 3 Series Convertible,for 2012-2016 3 Series Sedan & Car,for 2014-2016 4 Series,for 2014-2016 5 Series,for 2012-2016 6 Series,for 2013-2015 7 Series,for 2011-2016 MINI Also suitable for the following cars:F15 F16 F25 F26 F32 F33 F36 F80 F82 F83 E70N E83N E92NMaterial:metalcolour:SilverPackage Contents:1 * Headlight ballastOnly 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.