We have been discussing this problem on a couple of the Yahoo Passat groups.
I had to repair an ABS problem with a 2000 Audi A4 and I used
bba-remanufacturing to rebuild the module. I would recommend them and will
use them again with other components! ;-)
Also I think there is a write-up on how to remove the ABS module along with
another write-up on how to actually repair them yourself if you can solder.
BUT for less than $170, it is easier to let them repair it. ;-)

Signature
later,
(One out of many daves)
Thanks for the recommendation dave. For me, it will be better to let
bba-reman or the like to do the repair.
I have read that one might need to take out the windshield washer bottle
to get at the Torx screws which fasten the module to the valve body, and
to do that would need to take out the fender well.
It seems that it might be simpler to just unbolt the ABS unit and gently
bend the brake lines a little to get at the module screws.
> We have been discussing this problem on a couple of the Yahoo Passat groups.
> I had to repair an ABS problem with a 2000 Audi A4 and I used
[quoted text clipped - 3 lines]
> another write-up on how to actually repair them yourself if you can solder.
> BUT for less than $170, it is easier to let them repair it. ;-)
dave AKA vwdoc1 - 12 Nov 2008 12:32 GMT
I have not done the ABS module removal yet on a Passat, but on the '00 Audi
A4 I only had to move the P/S reservoir out of the way a little and then I
could easily get access to 5 of the 6 bolts. Only one bolt was a little
tricky but it was doable without removing the Washer bottle. I did not want
to move that bottle either! lol
TIP: Stuff some cloth or something down low to catch the bolts or tools
that you might drop! ;-)
Here is the website with some good pictures.
http://passat-b5.ru/index.php?option=com_content&task=view&id=296&Itemid=57
good luck and I agree with your decision to use bba-remanufacturing too!
;-)
Here are a couple of the Passat-specific groups to join!
http://autos.groups.yahoo.com/group/passats/join
http://autos.groups.yahoo.com/group/vwpassat/join

Signature
later,
(One out of many daves)
> Thanks for the recommendation dave. For me, it will be better to let
> bba-reman or the like to do the repair.
[quoted text clipped - 14 lines]
>> with another write-up on how to actually repair them yourself if you can
>> solder. BUT for less than $170, it is easier to let them repair it. ;-)
LG - 12 Nov 2008 15:41 GMT
If you remove the cowl cover to free the lines you can then remove the 2
side bolts and their pins. Then you can very gently, but firmly bend the
lines and module assembly to access the screws holding the module to the
valve body. I have no idea about where to reman, I only use factory parts to
repair.
> Thanks for the recommendation dave. For me, it will be better to let
> bba-reman or the like to do the repair.
[quoted text clipped - 14 lines]
>> with another write-up on how to actually repair them yourself if you can
>> solder. BUT for less than $170, it is easier to let them repair it. ;-)
Andrew Eckhardt - 13 Nov 2008 02:44 GMT
Thanks for the tip LG. I will probably pull the module next free
weekend, and try to do it with the fender well in place.
Definitely the beeping and other warnings will be a constant reminder to
get the job done.
> If you remove the cowl cover to free the lines you can then remove the 2
> side bolts and their pins. Then you can very gently, but firmly bend the
[quoted text clipped - 20 lines]
>>>with another write-up on how to actually repair them yourself if you can
>>>solder. BUT for less than $170, it is easier to let them repair it. ;-)