Yes and No. . .at least to my understanding of it. You won't swap odometer readings when you swap ECUs as the ECU doesn't store the mileage, but without the ECU, the odometer will not work. That's what I was saying. . .the new unit would have to send a signal to work the electronic odometer. I could be completely off on this, but I don't think I am. . .anyway, minor point nonetheless. . .your "daily driver" is going to lose some nice features at this point. . .until they find a way to keep the stock ECU in place to do some of the "little things".