The correct shield is part 035-906-274. It clips onto a Bosch sensor.
Yes, you can fab something for less that may even work better.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of Evan Mac Donald
Sent: Saturday, March 25, 2006 11:17 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Oxygen Sensor Ground

Dennis Haynes <dhaynes@OPTONLINE.NET> wrote:    The exhaust has so many
attachment points that a separate ground wire in
not necessary or even helpful. More important that you have the
deflector shield to keep airflow from cooling it off and road spray off
it. Both can cause most sensor issues. The sensor can get contaminated
from the outside. Its signal is derived from the difference on O2
content of the exhaust and outside air.

Dennis

 I have never seen the shield - what does it look like? Where would it
attach? A home-made one should serve just as well, should it not?

Evan Mac Donald

1984 Wolfburg
1985 GL 7 Pass.
1991 Carat Weekender
1972 Chevy P/U
1993 Bonneville