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Originally Posted by wvicary
I've installed hundreds of universal O2 sensors with no problems.... maybe you just had a defective one. As for the reference air supply, Bosch states that it gets it sample from the main electrical connector. They also recommend not using anything like dielectic grease as this can block the air from the sensor wire.
I've never heard or read of adding holes at the connection site.... I would think moisture would migrate into the wire and casue corrosion.
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Hi,
Yes, the hole is in the connector on the Sensor half, but if you crimp on the old connector to the new sensor, you run the risk of cutting off this reference sample supply.
You can quite easily use a pin or awl and carefully put a single hole in each side of the sheathing. The hole will be so small that getting moisture or corrosion won't be a major issue, but it will be sufficient to admit a reference sample for the sensor. I'm not advocating perforating the entire length of the sheathing, I should have made it clearer...
Happy Motoring!... Jim'99