If you do regular maintenance: oil changes, brake pads, rotors, tires, alignments, replace worn suspension components, the car can run for good 15-20 years and the V-8 can easily pull 250-300 thousand miles/500 thousand kilometers before the engine/transmission will get tired. Of course, the seats and other interior parts will show wear and tear, you might collect too many dings for your comfort but that is a different story.
In my family, I barely got rid of Ford Crown Vic at 170 K miles, it was half dead; my mom traded her Mistique at almost 90K that died on the dealer's lot, we had some other cars that barely make it past a 100K mark... at the same time, I've sold an E34 small block V-8 with 160K, the car was still running circles around newer cars on the road, I still have E39 with 180K on the clock and going strong...
Your 4.4 will last you to the day that you will sell it, and the next guy will be as happy as you might have been the day you got the car...
Now, while the BMW engineers can make good drivers' cars and ashtrays, nobody ever said that they can make cup holders and sound systems...
Any Honda or Toyota can show them a better cup holder... However, i was not after a better cup holder (even though it would've been nice!!)
Gotta take the bad with the good...