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Hello mgee, I'm Chris, a current Ford Lincoln Mercury employee.
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Your vehicle has 3 or 4 sensors depending on which exhaust it has. 2 are upstream O2 sensor and 2 are downstream catalyist monitoring sensors.
They each have one connector and it takes a special socket or a 22 mm wrench to unscrew them. Access is very tuff and sometimes must be done through the wheel well.