2005 3.0D X5 - still less than 43k miles.
In Warranty failures -
Door mirrors + control module both sides replaced - not working.
Power steering hoses replaced - leaking.
Oil pressure sensor replaced - intermittent operation.
Pano Roof sticking - adjusted.
Rear doors re-aligned - incorrectly fitted.
Internal a/c fans replaced - bearing failure (one is doing it again now).
Rear hatch locking mechanism replaced - failing to close and drew power killing the battery.
Headlight units fogging - replaced and the new ones are now doing it too.
Audio system fault - incorrectly fitted pin in loom, repaired.
In car OEM phone system failed to shut down resulting in dead battery - reprogrammed.
Out of OEM Warranty failures -
Auto transmission failure (Torque converter) - rebuilt as BMW offered no goodwill, covered by Warranty Direct - still faulty with overlap clutch/mechatronic module possibly also faulty now. Being investigated.
Central locking system lost all the keys. Fixed care of this site.
Likely to need replacement near term -
Brake rotors all round, corroded. Will have to change the pads too.
I can concur with some other owners that this is the most unreliable car I have ever owned and that BMW GB (similar to BMW NA) are the least caring folks I have ever had to work with. The Dealers aren't far behind and in most of my experiences, technically incomptetent, so I don't use them any more. I absolutely love the car, it's looks, driving position, build quality and the way it drives, but it lets me down at every possible opportunity which is a real shame, and parts are way too expensive. Would I have another one? Not a chance. Next major repair being required - it's gone. Pure and simple.