How to Replace an Oxygen Sensor in a Sable

by Zyon Silket

The Mercury Sable has four oxygen sensors to regulate and monitor the oxygen output of the vehicle. Each exhaust manifold has one sensor, and there is one sensor in front of each catalytic converter. Each sensor is the same and removes in the same manner. This makes replacing them relatively straightforward and easy to accomplish. The job requires basic hand tools and little automotive experience

Step 1

Locate the oxygen (O2) sensor, screwed into the driver's side exhaust manifold. The sensor has a green wire coming out of it and looks similar to a spark plug. Use the replacement O2 sensor for a visual aid.

Step 2

Trace the green wire from the sensor to the wiring harness the wire connects to. Unplug the wire from the harness.

Step 3

Remove the sensor from the exhaust manifold, using an open-ended wrench. The sensor is removed by turning counterclockwise.

Step 4

Thread the new sensor into the hole in the exhaust manifold with your fingers, and tighten it with the open-ended wrench.

Step 5

Plug the green wire on the new O2 sensor into the wiring harness. Complete Step 1 through Step 5 with the passenger side's exhaust manifold sensor.

Step 6

Locate the driver's side catalytic converter O2 sensor. To do so, follow the exhaust pipe from the exhaust manifold, until you locate the O2 sensor, screwed into a bung on the exhaust pipe.