Speedometer is way off

[REMC]

I felt like my speed was slower than what the car displayed, so have been comparing to Waze. At low speeds there is around 3 mph (5 Km/h) diference, at 70 mph is around 6 mph (10 Km/h), what seems like a lot to me.

Has anybody checked in a more "accurate " way?

Mine reads Km/h, no mods so far.

 

[misterquad]

You are going slower and the mpg is reporting higher than actual too. The 4Runner do the same thing. When I swapped my 265s for 285s on my 4Runner, the speedo was corrected. I tell myself that they designed it this way on purpose because they know many of us will be up-sizing to 285s.