think there is hardware as well as the owner H/Book says ESP can apply brake pressure to individual wheels as required so something is required to produce the pressureSince having my 2.0 TDCI remapped I get unwanted wheel spin both in wet and dry. I'm running wider 235's as well. So going back to justinwp1 original question is ESP/traction control a factory extra or a dealer extra (eg can it be added to the software) ?