I've seen a new coax spliced into the original one a few inches from the
ecu.
I'd try that as it's simple to do.

I have read that a coax shield  should only be grounded at one end, fwiw.

On 9/19/2014 10:26 AM, Neil N wrote:
> Mobile CB coaxial wire?  Image:
> http://upload.wikimedia.org/wikipedia/commons/thumb/7/73/RG-59.jpg/400px-RG-59.jpg
>
> Does the shield on your current O2 wire connect to your ECU? If so,
> and if you replace the entire wire, connecting that shield to the ECU
> pin might pose a small challenge.
>
> The O2 "signal" current must be incredibly small. Wire gauge of
> coaxial wire is small but should handle it.
>
> My only thought is heat-vibration possibly affecting the coax wire.
> The centre lead isn't stranded. Might fail soon at point it connects
> to O2 connector?
>
> Route thoughtfully?
>
> On 9/19/14, Don Hanson <dhanson928@gmail.com> wrote:
>
>
>> .so I am wanting to replace the whole wire, all the way from the O2 sensor
>> to the ECU..
>>
>> Second question:  Where might I source wire like that
>
> --
> Neil n
>
> Blog: tubaneil.blogspot.ca
>
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> Vanagon VAG *Gas* inline-VR Engine Swap Group:
>
> http://tinyurl.com/d7gd5ej
>