A few weeks ago I hit a rock which damaged my undercarriage of my '17 740i. The repair was carried out by replacing the bottom panels and the transmission skid plate. Sadly enough after the repair the car's steering has become over sensitive. Almost the feeling of the speed sensitive steering not functioning properly. The sad point: the car has been back to the dealer and the service department cannot find anything wrong with the car. I suggested to get in touch with the factory or ask the factory service rep. Anyone any suggestions?