Difference between ballast and control module for E90
My xenon headlight is flickering and all things point to the ballast. On ebay I can buy a xenon bulb with a starter. I think the starter is also called the igniter. I am confused about what the ballast is. If you go to realoem and other part websites, there is only the control module. Pix of a ballast on ebay look like the control module.
Can anybody clarify if the ballast and control module are the same thing and if not, show the pix of how they are different? I have scoured the previous posts but it is still not clear to me.