Has anyone ever had to do a speedometer calibration on their car?

[jonnyd330]

I am asking this question because over the weekend I was using the Wayz app for directions somewhere and it now shows your speed on the screen. Well as it turns out the speed it was reporting was about 7-8 mph slower than my speedometer was reporting. Has anyone every experienced this or had a problem with cars in the past? I was driving my VW so its not the zhp but I was hoping others might have some input on this.

I talked to one of my car buddies and he questioned weather the Wayz app was reporting the correct speed.

[az3579]

It's normal. BMWs are all programmed to read higher than they're actually going.
It can be corrected with PA Soft.

[cakM3]

Botond is my speedometer calibration tool...:happyspidey

[BMWCurves]

7-8 mph seems a little high. Mine's about 4-5 mph when cruising at 75 mph. Are you on stock tire sizes?

And yes, you can reprogram your speedometer if you have BMW Scanner and PA Soft.

[WOLFN8TR]

Botond is my speedometer calibration tool...:happyspidey

Yes he is! He recalibrated the speedometer on my M3 and now it reads exactly what every app I have on my phone reads. I would say going 80 before is now 74, so 6mph off.

[CarbonZHP]

I changed the calibration spec to the stock M3 code for my 255/35/19 rears