I am aware where they're made, not in China yet, but the Up! rolls off a VW production line Bratislava (Slovakia) along with the Seat Mii and Skoda Citigo. It's a VW owned line though so you'd sort of expect their (IMO) reasonably high quality standards to apply even if not actually made in Germany.
Whilst I personally don't work in the motor trade I do have a couple of friends who are experienced mechanics, one of whom has his own garage business, and they both tell me to generally stay away from cars from French or Italian manufacturers, they're not all cr*p but a fair few seem to have more than their fair share of issues.
Of all the cars I've owned the BMWs I've had have been consistently the most reliable and feel the best put together, less rattles, or other niggles than anything else, just a little more premium. The few cars from Japanese manufacturers have also been pretty good / reliable, just not quite on the same level as BMW.
That said my current main car is a Kia (Hyundai own Kia), we wanted a 7 seat car with four wheel drive for the caravan which didn't leave us with many choices, budget wouldn't stretch to anything Landrover badged. It's a nice car but as observed just not quite on the same level as say a BMW or VW. I really wished VW made a 7 seat option on the Touareg, Audi do with the Q7 but again it's at a premium price.
BMW don't have their own breakdown service, they sub it out to Allianz / Mondial, guess that was deemed the most cost effective to them but if the AA or RAC had made a better offer then maybe they'd use them. But I don't really get what that has to do with their reliability or otherwise?