Review on Replacement Xenon HID Ballast for BMW, Mini, Audi, Cadillac AL 307 329 153 & 307 329 193 Headlight Control Unit Module - 63117182520, 25806714 by Aaron Masek

Hardly distinguishable from the blocks removed from the headlight at the factory. Bought two and both work great. Installed on a 08 BMW 650i E63. For those worried about the price, there's not even a hint of the complexity of the lightweight ballast, such as in the iPhone. The iPhone is made in China and costs $500. So how could it be unthinkable that one of these units could cost $60? If BMW takes $500 from the factory, that's how much profit BMW makes on simple electronics. Just because someone sells something overpriced doesn't mean it's expensive. My friend, I am afraid you are guilty of a consistent error of assertion.