rooka21 
I would want the wires attached, preferably with both male and female plugs along with the oxygen sensor, most are gold plated the sensor itself contains a few milligrams of platinum.
Inside the MAS ( Mass Air Flow Sensor ) more platinum.
Winter is here and I'm now working at refining the precious metals out of my catalytic converters just toss the ceramic portion of the O2 sensor in with the cats being leached.
The on-board computer most have gold plated connectors both on the unit and wiring harness, but don't bet the farm of the latter and I've found computers with no gold.
I hear some noise about the air bag sensors having some gold content never pulled one so I cant say.
Some fuel sending units inside the tank have palladium oxide coating where the float indicator rides up and down with the level of fuel currently in the tank. On some cars and trucks your going to find chrome wire used for resistance readings of the fuel levels.
Wiring harness plugs and pins may or may not have palladium plating to prevent oxidizing, low end vehicles will be tin plated. Palladium has good resistance to oxidation from hash environment and weathering and is much cheaper than gold which shares this characteristic.
Your not going to get rich from this information, just some interesting facts.
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