There are as many as 6 speed sensors, but am going to assume you mean the one that drives the speedometer. It is located on the top of the transmission output shaft housing down behind the engine on the passenger's side of the engine compartment. the sensor is covered with a cardboard and foil protective cover.
on the dash
On the transmission.
My auto lamp light sensor is not working on my Mercury Sable 2002. Why?
location of engine cooling fan sensor
Where is the starter located on a 1997 mercury sable ,and if any display a photo of the part.
where is turn signal relay located at 1989 mercury sable
switch sensor located next to the transmission
On a 2001 Mercury Sable : The battery is located in the front of the engine compartment , on the drivers side
On a 1999 Mercury Sable : The transaxle ( transmission ) is located in the engine compartment , bolted to the engine
you do have an ( 02 ) sensor on the exhaust system
The ECM in a 1999 Mercury Sable is located on the inside of the vehicle on the passenger side. It is located under the kick plate.
2005 sable fuel filter?