Note: It is at pretty much all speeds and not just 55 that the variation can be seen between devices and the vehicle. I purchased this used with 29K miles on it. I noticed on the drive back from md to pa that the speed on the speedometer was different than my tomtom gps. A friend was driving in a separate car and so I called them and tried to identify their speed to mine and it seemed off to theirs as well. I took the car into the Hyundai dealer in the next month or so to ask them to adjust the speedometer to which I was told it cannot be altered. Well here I am over a year later and every single gps based system I have put into my car, another tomtom, my sons garmin, my wife's garmin, my new garmin and my phone all are in synch with each other. The problem is that my Santa Fe is always stating I am traveling about 3 mph faster than all these other devices. If this is the case then this would show a higher number of miles being driven that what is actually occurring. I drive 20-25K miles a year and this would most definitely add up over the life of the vehicle thus showing me to be out of warranty sooner than would be expected. Why does every electronic device show the same speed but my car is telling me I'm going faster?

- Glen Burnie, MD, USA