rofl, did you see the comment written on this article? lol
"My BMW 335 is off by 5 mph at 80. That is almost 6%. So when the vehicle gets to 50,000 miles, the odometer, and the NADA value, will think the vehicle has 3,000 more miles on it than I actually drove. When speedo error is so far off that it effects your resale value, that seems a bit excessive."