Oxygen sensor connector, harness side

[Quicksilver]

Originally Posted by Walt Fricke

Here's a related question: why did Porsche use this particular connector for this purpose? I've never seen this kind of connector except for this use. A connector is a connector, and if you need to extend shielding across a connector, there are plenty of standard electonic connectors which do just that.

I suspect that a big reason is that an O2 sensor's requirements are a little unique so they used what the supplier recommended. You want the contact points of the connector to be sealed to insure that they don't corrode but there is also a very conflicting requirement.

An O2 sensor requires that its wires not be soldered or sealed. The O2 sensor actually draws reference oxygen through the stranded wires and if that is blocked the sensor won't operate correctly. Here is a video from Bosch reiterating this: https://www.youtube.com/watch?v=ex1Hki6-NHw