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Old 09-16-2010, 12:16 PM
cn90 cn90 is offline
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Location: Omaha NE
Join Date: Mar 2006
Posts: 14,352
Mein Auto: 1998 528i 5-sp 140K+
My bad,

Voltage Regulator and Rectifier are 2 different entities (I took College Physics too long ago...).
In some other alternators, these 2 items are packaged together.
In this particular Bosch Alternator for BMW E39, they are located separately.

Talking about component failure, I think the Voltage Regulator fails more often than the Rectifier part.

Attached is an updated diagram:

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