2002 Corolla Speedometer Problem

[2Slow_MTL]

I just realised this after many months, that my speedo reads 5km/s more than what i am actually driving at. Is this common and is there a quick and easy fix to it?

thanks

[finkle1359]

Reading a couple under is common with lots of cars. Auto makers want to make sure you are not going faster than what it says, so most will make the speedo a little on the fast end. Most of my cars read 2-3 MPH faster then the GPS.
Question 1: what tire and size are you running?
Question 2: What did you use to confirm that you are running slower? GPS is more accurate then other methods (IE: police speed carts or driving behind someone else and getting their speed compared to yours).

[2Slow_MTL]

oops wanted to mention but forgot, tires are oem size, inflated to oem spec.

Tests were done with a phone gps, and a radar. tests were also done with my other car, a newer corolla, on which the speedo is precise.

Corolla 2002 shows 5 km more.

Corolla 2006 does not.