Speedo Miles to KM change 720p

I changed the printed plastic sheet on my VW Golf Speedometer from Miles to KM's. By doing this I don't have to re-programme the Electronic Control Unit (ECU) to accept a whole new Speedometer / Instrument Cluster. Should work with most cars.

[@galaxymaintenancesal5647]

Your speedo will always be generating in Miles, this cannot work if your using the sheet from a KM speedo.
You will have to buy a converted printed sheet from a specialist supplier to work on your original cluster.

[@keepitassimpleasyoucan145]

Speed is independent of whether you measure in Miles, KM - just the graduations are different - 10km will always be 6.21 miles.
The old one has the KM graduations also, alongside the larger miles graduation on the outside, but smaller, so it was easy to confirm that the needle was giving the same reading. Just to be doubly sure I done a few test runs with the SatNav to confirm.
I did get little shock though on a different Golf where the previous owner had changed to a larger diameter alloy rim and tyre without re-calibrating the onboard computer ... now that gave an inaccurate reading all-right - I noticed when the speed fines started comin' in :(
All the best,
Seán

[@unapezi4630]

Worse ever foil exchange i've seen. Was no need to cut the foil. And as the upper comment have been made, even if you change km to miles ore viceversa, the speedo will always show the miles if the ipcs are from an UK car, or the opposite (km, if EU ipc).

[@keepitassimpleasyoucan145]

Hello, thanks for your comment.
Perhaps you may not have read my reply to the 'upper comment' to clarify?
How would you explain it to the Judge … my car measures in miles per hour and I was driving at 10 miles over the speed limit but the Speed Camera measured me at 16.1 km over the speed limit so it was incorrect ???
I’m afraid you’re still getting the ticket whether you measure it in miles or KM ‘cause the actual speed you were travelling at is still the same, and the same amount over the speed limit.
Anyway, if you jump the video forward to 1.31 you'll see the printed foil from my old speedo has both the Miles and Kilometers marked so you can read in both Miles and KM ... so it measures the speed.
So at 50 mph the speedo arm will be at the position it has been graduated to for 50 miles ... which is 80km.
Granted, if you take your foil from a different model car ... firstly it probably won't fit but also it most likely would be graduated differently, but you could confirm by placing one over the other and holding up to the light to establish that both 0's match, and the 50 miles mark match with the 80km mark ... like that great scene from the film 'This is Spinal Tap' where the guitar is graduated up to 11 :)
With regard to cutting the Foil … fair enough, I didn’t need to cut it but the internal spring mechanism of that speedo arm is so fragile, if the top doesn’t pop off easy(which it didn't) you risk damaging the system inside … then it most probably wouldn't measure correctly … in miles or kilometers.
All the best !
Seán