Two separate issues I think Stephen. The bump steer being largely reduced but not completely cured by the addition of MMC's sarcastically named "comfort kit" which brought the track rod angle from steering rack closer to horizontal when static. This was offered early in production as a short term fix for early models, later corrected by different uprights which achieved similar. Most other changes/improvements including chassis took place late in 2014 when the NVH kit was introduced, with chassis upgrade kit also becoming available.
