Unscrewing a sensor and replacing it is pretty straightforward. You might need this special socket to clear the wires. Twelve years and more than 100,000 miles have passed under your trusty ...

Replace both the upstream ones at the same time so the reading will be consistent. You can keep the downstream one on there. The only difference between the two is the length of the wire.<BR><BR ...

Ford Ka - Manufacture parts? Which O2 sensor to replace?. Hello everyone, I have a Ford Ka 2003, just under 60,000 miles with the Check Engine light on.