How do you turn the oxygen sensor off the dang car. The space is beyond cramped.

 

Go to your nearest parts store and look around teh tool section. There should be a few sockets that are made especially for O2 sensors. Here in teh states I had a choice of two from autozone, both made by the same company, both did the job but made different. Either way it should have a space so you can get it around wiring.