Pelican Parts Forums - Question on BMW 3-Series E30 O2

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- - Question on BMW 3-Series E30 O2_Sensor (http://forums.pelicanparts.com/101-projects-discussion-forum-bmw-3-series/883461-question-bmw-3-series-e30-o2_sensor.html)

I have a 1985 321i, 2 door, 6 cylinder, 5 speed that was imported through Houston, TX to my home.
I found that the shop seemed to have jury-rigged a 3-wire O2 sensor to the exhaust. One white wire is piggy-backed connected to the gray with green stripped center wire on the diagnostic connected on top of the intake manifold. The other white wire is spliced into a green wire that heads into a wire loom on the firewall, the black wire is grounded to the frame.
I can't believe this came from BMW this way, was it to pass USA inspection?

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Is it s US vehicle? If not, I don't have info for it so I can't confirm the wiring. It could be an add-on for us emissions or a shoddy repair.

- Nick