I don't think that there is any difference. I will find out when I order the new part. My impression is that the big difference between the ST and basic Fiesta steering systems are the knuckles and the tuning of the EPAS level of effort. Last night ,I went under the instrument panel of the 2011 SE hatchback that I'm turning into a jolly. It still has a date imprinted tag on it's steering shaft of 6/14/10. So it is original to the car. I got no noise from it in the short drive I had before I began knocking it apart.