Fatures:
Excellent: A ballast is a crucial part of a fluorescent or HID lighting system. In a fluorescent lighting system, the ballast provides the voltage needed to start the lamp and regulates the electrical current of the light once it is lit. Without a ballast, the lamp would draw too much power, causing it to burn out quickly-sometimes even within a few minutes. The ballast prevents this from happening and ensures you get the benefits of the lamp's full lifetime.
Practical: The ballast can act as DC to AC converter so that you can use the normal DC power source in the car to light the bulbs efficiently. The most common problem of HID Ballast failure is flickering, dipped beam not working or light failure, which may result from long term use. When having problems, you'd better replace them to avoid inconvenience to your driving.
Manufacturer Part Number: 8K0 941 597 E
Compatible with the Following Part Numbers and Vehicles: for VW/Audi Porsche #: 8K0941597E, 8K0 941 597 E; 
Interchange Part Number: 8K0941597, 8K0 941 597, 8K0-941-597, 8K0-941-597-C, 8K0 941 597 C, 8K0941597C, 8K0-941-597-E

 

Fitment for Reference:
for 2010-2015 Audi A1
for Audi A3/S3 2009-2015
for Audi A4/S4 2010-2015
for Audi A5/S5/RS5 2008-2015
for Audi A6/S6/RS6 2009-2015
for Audi A7/S7/RS7 2010-2014
for Audi A8/S8/A8L 2010-2014
for Audi Q5 2009-2015
for Audi Q7 2010-2015
for Audi Q3 2012-2015
for Volkswagen CC 2012-2015
for Volkswagen 2012-2015
for Volkswagen Golf 2014-2015
for GTI, Volkswagen Tiguan 2012-2015
for Volkswagen Touareg 2011-2015
for Volkswagen Passat 2013-2015
for Volkswagen Polo 2010-2013
Note: please make sure that the product compatibility matches the parts you want to replace,These are all adapted models, the matching table does not include all.

 

Specifications:
Material: Aluminum Housing + Electronic Material
Fitment Type: Direct Replacement

 

Notes:
Please allow a slight dimension difference due to different manual measurements.
Due to the light and screen setting difference, the item's color may be slightly different from the pictures.

 

Package Contents:
1 x Xenon HID Headlight Ballast Control Unit