We took a new Santa Fe for a test drive today and when driving down our steep driveway and then turning left (downhill with brakes on), the back wheels locked up completely and skidded along while the front wheels turned normally. Tried this with 4WD lock on and same result. I am concerned we are going to leave rubber on the driveway everytime we come home and will wear the tyres out too fast. Any ideas what's causing this? Is it the EBS braking system? Any tips would be appreciated as we would like to buy the car if this can be resolved. Thanks!