A friend of mine is looking at a 2004 X3, and with me being an X3 owner (2007), he asked me if there are any known issues with that 04 model year. Of course, I know about my model year's issues (*cough*transmission*cough*), but wasn't up to speed on his year...

Could you experts give me a head's up on the known problems, or perhaps things he should check out on the car before/if he buys? Thanks for your help!