The automatic in my 1990 e34 was well over 240,000 miles when I sold it.
BMW doesn't make transmissions. They buy automatics from GM and ZF. They buy manuals from ZF and Getrag. Magna makes some of the x-drive components. Early 1st generation MINIs used a troublesome Rover 5-speed manual.
Some e46 323i cars have the infamous "No Reverse" transmission. Google will find details.
The models and equipment (standard and optional) illustrated in this post reflect my misunderstanding of vehicles supplied by BMW AG to the German market. In other EU member states, the truthyness of my posts may vary. Please ignore this post. Subject to change.