Usually it is written on a sticker on the side of the alternator - they are
physically larger (just) than the 90A units on the Vanagon / Golf / Jetta.
Usually they are on the upper end vehicles with AC.  Corrado and Passat
have them.

At 09:28 PM 21/06/2000 -0700, Todd Last wrote:
>How does one identify these 120A alternators?
>
>David Marshall wrote:
>
>> Michael,
>> As long as the Alternator is from an A1 or A2 series VW and uses a V-belt
>> it will work on the Vanagon - just swap the pullies.
>>
>> At 05:17 PM 21/06/2000 -0400, Michael J. Sullivan wrote:
>> >Dear List,
>> >
>> >Anyone know whether or not the "newer" VW 120A alternators (e.g. from 1997
>> >Jetta) will fit without a problem on a wasserboxer? There are plently of
>> >them in the junkyards.
>> >
>> >Cheers,
>> >
>> >
>> >Michael J. Sullivan
>> >IPS "SWATteam" Architect
>> >Open Market, Inc.
>> >
>> >*********************************************
>> >     phone: 781.359.7624
>> >      work: http://www.openmarket.com
>> > scan tips: http://www.hsdesign.com/scanning
>> >   vanagon: http://www.hsdesign.com/vanagon
>> >*********************************************
>> >
>> >
>>
>> -- David Marshall - Volkswagen Enthusiast - Quesnel, BC, Canada   --
>> -- 78 VW Rabbit, 80 VW Iltis, 80 VW Caddy, 84 VW Westfalia        --
>> -- 85 VW Cabriolet, 87 Audi 5000 Quattro, 88 VW Syncro Double Cab --
>> -- David's Volkswagen Home Page        http://www.volkswagen.org  --
>> -- Fast Forward Autobahn Sport Tuning  http://www.fastforward.ca  --
>> -- david@volkswagen.org (pmail) or vanagon@volkswagen.org (list)  --
>
>
>

-- David Marshall - Volkswagen Enthusiast - Quesnel, BC, Canada   --
-- 78 VW Rabbit, 80 VW Iltis, 80 VW Caddy, 84 VW Westfalia        --
-- 85 VW Cabriolet, 87 Audi 5000 Quattro, 88 VW Syncro Double Cab --
-- David's Volkswagen Home Page        http://www.volkswagen.org  --
-- Fast Forward Autobahn Sport Tuning  http://www.fastforward.ca  --
-- david@volkswagen.org (pmail) or vanagon@volkswagen.org (list)  --