Hi all,
I just acquired a 1993 740i today, and had not noticed until today that it has HID headlamps. I was told before getting the car that a left low beam was out and needed replacement, so I figured, what $10-15 fix.

Anyway, so I discovered the HID's, and am afraid that I already know the answer to my question. What do I replace? Is it just the bulb, or the entire assembly? At this point, I'm not even sure what to buy, but i'm afraid my $10 is going to be more like $250. Any help is appreciated. Thanks!