Mine is 3mph off (high) as well.
It appears to be generalized to me.

 

Hahaha... both mine read 4 over and my Audi reads 2-3 over... it's a German thang....celebrate!!!!

 

Well looks like it is systemic, so that eases my nerves a little bit. Still, aren't you guys frustrated that an extra 3-8% of miles are being put on your car from this problem?

 

no.........

 

Perfectly normal. All car manufacturers calibrate their speedometers to read a few percent high. It is so you can't hold them liable for speeding. (I can't recall where I read that.)

 

In many countries the legislated error in speedometer readings is ultimately governed by the United Nations Economic Commission for Europe (UNECE) Regulation 39[4] which covers those aspects of vehicle type approval which relate to speedometers. The main purpose of the UNECE regulations is to facilitate trade in motor vehicles by agreeing uniform type approval standards rather than requiring a vehicle model to undergo different approval processes in each country in which it is to be sold.
European Union member states must also grant type approval to vehicles meeting similar EU standards. The ones covering speedometers [5] [6][7] are similar to the UNECE regulation in that they specify that:

• The indicated speed must never be less than the actual speed, i.e. it should not be possible to inadvertently speed because of an incorrect speedometer reading.

 

does that settle it for some of you guys ?

 

It's probably for the best for me

 

I noticed several years ago that my speedo read 3 MPH faster than indicated by the local radar-activated "Your Speed is ___ " signs when I was driving around 30 MPH. I was concerned because I thought it meant that my speedo was reading 10% too high. What I learned was that the speedometer on 996s is calibrated to always 3 MPH high on purpose. So, even at 70 MPH, it only reads 3 MPH too fast, which is not a problem as long as you know that.

 

Where'd you learn that?

 

Mine is off by 3 at all speeds. I have notice that most people have reported in the past that theirs are off by 3. Given what has been said about calibration legislation I think that German electronics are very accurate... they are all about 3mph high on purpose.