Quote:
Originally Posted by California98Civic
Speedometer is another story. Very odd since speed and distance use the same sensor mounted on the transmission.
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I think speedo / odo differences are quite common, it's just that most people don't check both.
Australian design rules require speedo accuracy to be between 0% and 10% fast, if your speedo says 100kph, you're really doing 90-something kph. I guess the U.S. rules would be similar.
On the other hand, I'm not aware of any restriction on odometer accuracy.
My Mazda and Toyota both have non-standard wheel /tyre sizes.
The speedos on both are accurate to my GPS, but the Mazda odo reads 5% slow and the Toyota reads about the same % fast.