To replace the oxygen sensors on a 2000 Mercury Cougar, you will first need to locate the sensors, which are typically located on the exhaust system near the catalytic converter. You will then need to disconnect the electrical connector and use an oxygen sensor socket to remove the sensor. Before installing the new sensor, make sure to apply anti-seize compound to the threads to prevent seizing in the future. Finally, install the new sensor, reconnect the electrical connector, and clear any error codes using a diagnostic scanner.
4
FOUR
in the exhaust pipes just before the catalytic converters
Usually the come in pairs. So 4 seems most likley.
Need a little more information. there are a number of reasons why your cougar would run rough. Anywhere from the mass oxygen sensor to the idle control sensor, oxygen sensors and on and on.
Mine is an automatic and it has 3. one on each exhaust manifold and one after the cat.
AnswerThere are three O2 Sensors on my 1999 Cougar. Two are located just before the Y-Pipe and are both wired to the drivers side of the Y-Pipe. The other is located just after the Catalyic Converter.Easy to change.
There are a total of ( 4 oxygen sensors ) according to the engine wiring schematic for the 1997 Mercury Mountaineer in my Haynes repair manual ( 2 oxygen sensors are " upstream " sensors used by the PCM to adjust the air / fuel ratio of the engine ) ( 2 oxygen sensors are " downstream " sensors / catalyst monitors )
Four
There are two.
There are two.
4