They were definitely on ok and the tread is the same but will look at direction of the tyres as suggested, however I must be honest and say I don't really want to swap them again it case it comes back because all seems to be working fine at the moment, but I suppose time will tell.

What is a yaw sensor I have heard about this but what does it do and where is it. One bad thing about these cars is that they do have too many sensors on them and after reading lots and lots of post it nearly always seem to be the sensor that is faulty and not the actual car so in my opinion they just cause aggro !!!!