That's probably because the supersession is out of date, resulting in a
"Invalid Part Number Found" Code reply from their latest ETKA.

Here's the info you need:

Part Number             Description
037-121-133A    Flange

Replaced by:

037-121-133B    Flange
Must also use the following when replacing:
357-121-140             Plug Qty 1
025-121-142             Retaining Spring Qty 1
N90316802               PR-1GG/309 Qty 1

I have no idea what the last item is.

Info obtained from VW ETKA, Version 5.3.  The later version may not have
this supersession.  All the more reason to install later versions of ETKA
in a different folder to keep from overwriting previous versions (the same
reason I keep ALL Microfiche plates of ALL dates so I can refer back as far
as I can for that "elusive" item).

Yeah, I'm a packrat with computer data, parts fiche, parts books and other
parts references ;-)

Jim Thompson
oldvolkshome@earthlink.net
http://www.oldvolkshome.com
***************************
> [Original Message]
> From: Mark Cumnock <kayakwesty@YAHOO.COM>
> To: <vanagon@GERRY.VANAGON.COM>
> Date: 6/24/04 5:17:53 PM
> Subject: how to find new part# for old part number ????
>
> I went to the local dealer here...what a waste of time.....anything
> outside the box forget it...I have a waterflange off my Jetta with part#
> in hand and they can't look it up...is there a web resource to cross
> reference vw part numbers
>
> My part# is 037-121-133-a...i need help