Comment by martinpw
6 hours ago
> When I talked to the dealers, they said that the speedometers only have to be accurate +/- 10% according to the SAE specifications.
I believe the requirement is only one way - they can read high by a certain % but they cannot read low. Which makes sense. But that means in reality they will usually read a little high.
Wow TIL. I have observed that my rental cars in Europe all have faulty speedometer. Multiple brands, multiple countries. So this is why.