The way I look at it is that Ford would not fit one if it was not needed as we all know they would not spend money needlessly , but then there is a lot of cars out there running without one that seem to run without an issue , the way I have done it so you can add it in later if you find one is get a faulty speed sensor and cut the wiring from it to the plug , you can then join the required wires and leave the main loom un-mollested , or you could just cut and join wires before suppressor plug if you canot find the 3 pin plug required