Features: 1.OE Number: The referencing OE number of this xenon hid ballast control unit are 8K0941597C, 8K0941597C, 8K0941597B, 2048703226, A2048703226. 2.Fitment: The headlight ballast control unit module is a replacement for A1 2011?2015, for A3 S3 Facelift models from 2009, for A4 S4 B8 starting from 2009, for A5 2008?2014. 3.Function: The high performance ballasts can effectively convert voltage, stabilize current and protect pulse surges to ensure that headlamps work in a safe environment. 4.Material: Made of premium aluminum alloy for better heat dissipation and vibration resistance performance, can be mounted on the left and right of the headlight. 5.Easy Installation: Easy to install, no modification, cutting, or drilling required. It adopts original standard, which is a perfect replacement and can perfectly match to your car. Specification: Item Type: Xenon HID Ballast Control Unit OE Number: 8K0941597C, 8K0941597C, 8K0941597B, 2048703226, A2048703226, 8K0941597 Material: Aluminum alloy Installation Position: Mounted on the left or right of the headlights Fitment: Fits for A1 2011 - 2015 Fits for A3 S3 Facelift models from 2009 Fits for A4 S4 B8 starting from 2009 Fits for A5 2008 - 2014 Fits for A6 S6 C6 C7 Facelift models from 2009 Fits for A7 2011 - 2014 Fits for A8 S8 D4 starting from 2009 Fits for Q3 Q5 Q7 starting from 2009 Replacement for Chrysler 300C - from 2011 Replacement for Lancia Thema LX - from 2009 Fits for 991 981 Macan - from 2012 Replacement for Seat Alhambra - from 2011 Fits for Octavia III / SuperB - from 2013 Fits for Caddy (2011-2015) Fits for CC (2012-2015) Fits for Sharan II (2) Note: Please double check the part number of your item, matching information is for reference only. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!