I drive a '95 318ti at 144k miles and I have to say that it feels solid as anything, but there are just enough gremlins to give the car plenty of character.
For example my car has some kind of seat belt sensor that failed, so the airbag light goes on for 5 minutes then goes out, each and every time you start the car. Also, about once every 2 months the ignition key spins around and and around in the cylinder before it catches and starts the car.
I also have to award bonus points for when it wouldn't start for 10 minutes after I took it to a coin operated spray and wash place, and ended up spending an extra $2 to use the giant dryer wand with aimed in the general direction of the ECU with the hood opened.
So don't assume you'll be in a colorless world of automotive appliance-dom with the Bimmer.