Section 22 (Generators & Regulators): Description
WARNING: This page is about a different car, the 2004 Audi S4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
Bosch alternators are conventional 3-phase, self-rectifying type alternators. Bosch voltage regulators are transistorized and integral with alternator. Manufacturer recommends replacing generator as an assembly.