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As discussed in another thread here on the board, the margin of error is more significant at higher speeds. Also, from what I was able to find (looking at some posts from another board a while ago), the margin of error can be up to 10% +2.4mph.
So, 60mph could be indicated as high as 68.4mph. 155mph (Electronic Limit in the US) could be indicated as high as 172.9mph.
The fines are very significant to the manufacturer if the speedo is understating the actual speed, so I'm pretty sure that these errors are intentional.
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Ex Stig
'25 M5 Touring (on the list, first slot)
'24 X7 M60i
'22 M5 CS - (sold)
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