How to get objects Y velocity in bge

Game Engine Game Engine Support and Discussion
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#1

I’m trying to make a car game in bge but I need to get the y velocity and put it into a property.
How can I do that in python?

#2 
import bge

owner = bge.logic.getCurrentController().owner

owner["SPEED"] = owner.localLinearVelocity.y
#3

I can’t get it to work.
OK got it fixed.
I found out that you can’t use a sensor object.