Interesting. My 1990 760 turbo had an ND alternator but I never considered it an upgrade. I have found most Bosch alternators to be extremely durable and reliable...in many cases the only reliable items in a Chrysler product of a certain era. Granted, Nipon Denso has has made long life, but mostly disposable, alternators in Japanese cars and motorcycles for decades.

Good factoid to squirrel away should the slip rings on my Bosch ever wear out. Granted, my current Bosch only has 175K miles on it so should be good for another 10 years at my 5K miles a year I put on it.