How many O2 sensor does saturn ion 2.2 4L 2007 have?
It has two of them. These are cylindrical pieces, similar to spark plugs in look, that stick out of the exhaust tubing three inches and have a wire leading out of them. These are the only electrical connections on the exhaust. One sensor is located at the base of the exhaust manifold where it contacts the exhaust system, and another approximately two feet down the exhaust tubing from the flange at your converter. Hope this helps
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