23 Months ago, I had the alternator replaced in my 2000 54Ois. Car had about 115,000 miles on it. On Sunday, the alternator went out again, car has 143,000 miles on it. Called the repair shop, who insisted they used a "BMW dealer part" when they replaced it previously. I was told that despite the part listing for $950.00 (rebuilt), Bosch has dropped in their quality control department, and the rebuilds just dont last as long as they used to.

I'm new to this section of the forum, so forgive me if this has already been discussed. I searched, but didnt see anything about this.

Your input would be appreciated. Car is being repaired, but I cant understand why the rebuilt part should fail so quickly.