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I tried a number of sensors with no success. I purchased from https://www.sparkplugsrus.com/ in the UK. They supplied the factory parts and they worked.
I know this is an older post, but clearly all of you ladies and gents have the expertise.
I have a 2009 Vantage Roadster 4.7 with 17k miles. I had it up on a lift and saw the heat-shield is missing and one of the O2 sensors must have rubbed the hot exhaust and exposed the wires causing an emissions error on dash. So it's replacement time.
I read the post above and see Ford, Volvo parts seem to be a direct fit replacement? If so, any one point me in the right direction, I'm not sure if I should replace all 4 while i'm there, I don't know what is post-cat or pre-cat, etc. I'm no mechanic clearly and feel i'm going to order the wrong parts.
The passenger "blue" wire to the right is the exposed wire to replace.
Green connector with white lead is PRE catalyst. Meaning 1st inline. POST which is referred to sometimes as downstream or catalyst monitor is blue connector. Judging by their previous experience I would opt to replace all 4 and start fresh. Depending upon the codes you have may get by with the PRE cat sensors as they are more common to fail.
