1、Applicable Model: The xenon headlight ballast is for A3 A4 A5 A6 A7 A8 Allroad Q7 Q5 RS5 S4 S5 S6 S7 S8, for 300 2011 to 2017, for Macan 2015 to 2017, for CC Eos. 2、OE Number: The part numbers for reference are 8K0941597B, 8K0941597E, 8K0941597C, W003T20171, BAM92143700, BAM92‑143700, W003T21971, 8K0941597B, 8K0.941.597.B, 8KO941597B, 8K0941597C, 8K0.941.597.C, 8KO941597C, W003T18471, 8K0941597E, 8K0.941.597.E, 8KO941597E. 3、Main Function: The xenon HID headlamp ballast stabilizes the current flow, protects the xenon bulb and igniter, and provides a stable lighting effect. 4、Durable Material: The HID xenon headlight ballast control module is made of durable and reliable material, high strength and wear resistant, having long service time. 5、Easy to Install: The xenon ballast HID control unit module has a simple installation, convenient and time saving, don't need too much tools or complicated steps. Item Type: Xenon Headlight Ballast OEM: 8K0941597B, 8K0941597E, 8K0941597C, W003T20171, BAM92143700, BAM92-143700, W003T21971, 8K0941597B, 8K0.941.597.B, 8KO941597B, 8K0941597C, 8K0.941.597.C, 8KO941597C, W003T18471, 8K0941597E, 8K0.941.597.E, 8KO941597E HID Bulb Type: D3S, D3R, D4S, D4R Output Or Sortie Voltage:42V AC Open Circuit Voltage: 1300V DC Power: 35W Applicable Position: Around Headlights Installation Mode: Direct Replacement Installation Fitment: For A3 2009-2011 2015-2016 For A4 2009-2016For A5 2010-2017 For A6 2009-2015 For A7 2012-2015 For A8 2011-2014 For Allroad 2013-2016 For Q7 2010-2015 For Q5 2009-2017 For RS5 2013-2015 For S4 2009-2016 For S5 2008-2017 For S6 2013-2015 For S7 2013-2015 For S8 2013-2014 For 300 2011- 2017 For Macan 2015-2017 For CC 2013-2014 For Eos 2012-2014 1 x Xenon Headlight Ballast