I have had this too.  Even though I splice, I changed Brands to NTK, four years and not one hiccup!!! My previous was the non-vanagon "Ford" application made by Bosch that I purchased from a list vendor.  Worked for about three monthes, but we have a wet season here in the Northwest.

Mark

, not Date:    Fri, 12 Oct 2007 08:59:34 -0700
From:    Tom Forhan <fourwdvw@YAHOO.COM>
Subject: Re: Power loss when engine wet and cold

I think next time I will just order the sensor with
the factory matching loom, and avoid the splice issue
entirely.

Those connectors are interesting, but way pricey!

--- TC <trclark@SHAW.CA> wrote:

>> ----- Original Message -----
>> From: "Tom Forhan" <fourwdvw@YAHOO.COM>
>> To: <vanagon@GERRY.VANAGON.COM>
>> Sent: Friday, October 12, 2007 7:43 AM
>> Subject: Re: Power loss when engine wet and cold
>>
>>
>
>
>>> > I'll second the O2 sensor. Last winter we had
>>
>>
>> exactly
>
>
>>> > the same symptoms, and were running a splice-in
>>
>>
>> type
>
>
>>> > 02 sensor.
>>
>>
>> I was just wondering what the experience is with o2
>> sensor hooked up with
>> Posi-Seal T Weathertite connectors
>> http://www.posi-lock.com/shoponline.cfm#11
>