This 12 volts voltage regulator is intended for use on an alternator (AC) where the regulator is not integrated into the alternator itself. Volkswagen Buses with a type 4 engine, on the other hand, have always had a separate voltage regulator.
The alternator of type 1 engines is recognizable by its non-straight cylindrical shape with a battery connection under a nut, plus 3 connections to the voltage regulator.
The voltage regulator ensures that the alternating voltage is converted into a usable direct voltage, this regulation is done here electronically compared to the old voltage regulator originally fitted. The advantage is a more constant voltage, better resistance to humidity and less wear.
Note: A part in an open package for this type of parts cannot be returned.
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